Fixed Lens Mounts for OEM Applications


  • Fixed Mounts for Ø1/2", Ø1", or Ø2" Optics
  • Matching Optic Axis Height for OEM Applications
  • Baseplates Available for Breadboard Compatibility

FLM2

Ø2" Fixed Lens Mount,
0.36" Max Optic Thickness

 

FLM1T

Ø1" Fixed Lens Mount,
0.48" Max Optic Thickness

FLM05

Ø1/2" Fixed Lens Mount,
0.14" Max Optic Thickness

FMB2

Translation Baseplate

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SM05-Threaded Fixed Lens Mounts
SM1-Threaded Fixed Lens Mounts
SM2-Threaded Fixed Lens Mounts
Translation Baseplates for OEM Fixed Optic Mounts
Rotation Baseplates for OEM Fixed Optic Mounts

Table 1.1  Vacuum Specifications
Vacuum Compatibility
as Packageda		 >10-6 Torr
Materials 6061-T6 Aluminum
Preparation and
Packaging		 Chemically Cleaned and
Double Vacuum-Bagged
  • This is the pressure at which these components can be used with no additional processing. They can be used at even lower pressures with additional cleaning and processing.

Mounts for OEMs

Thorlabs' Fixed Lens Mounts were designed to meet the needs of OEM customers. To that end, we are equipped to manufacture these mounts in high volumes and with timed delivery. Additionally, we can design and manufacture modified versions of these mounts for mounting additional optic types, sizes, and shapes. For example, we have produced similar fixed mounts for square mirrors, diffraction gratings, different optic sizes, or different beam heights. To find out more about our OEM capabilities, please contact Tech Sales.

Features

  • Fixed Lens Mounts for Ø1/2", Ø1", or Ø2" Optics
    • Available for Standard or Thick Optics
  • Internally SM-Threaded 
  • Suitable for Vacuum Applications 
  • Common Optical Axis Height of 1.50"
  • Mounting Holes for Use with 1/4" (M6) Screws
  • Breadboard Compatibility via Translation or Rotation Baseplates
View Imperial Product List
Item #QtyDescription
FMM15F1Ø1.5" Front-Loading Fixed Mirror Mount for OEM Applications
PF15-03-P011Ø1.5" Protected Silver Mirror
FMB31Translation Baseplate for Ø1.5" and Ø2" OEM Fixed Optic Mounts
FLM1T1Ø1" Fixed Lens Mount for OEM Applications, 0.48" Max Optic Thickness
AC254-100-AB1f = 100.0 mm, Ø1" Achromatic Doublet, ARC: 400 - 1100 nm
FMB21Translation Baseplate for Ø1/2" and Ø1" OEM Fixed Optic Mounts
FMM05F1Ø1/2" Front-Loading Fixed Mirror Mount for OEM Applications
PF05-03-P011Ø1/2" Protected Silver Mirror
FMB11Rotation Baseplate for OEM Fixed Optic Mounts
View Metric Product List
Item #QtyDescription
FMM15F/M1Ø38.1 mm Front-Loading Fixed Mirror Mount for OEM Applications
PF15-03-P011Ø1.5" Protected Silver Mirror
FMB3/M1Translation Baseplate for Ø38.1 mm and Ø50.8 mm OEM Fixed Optic Mounts
FLM1T/M1Ø25.4 mm Fixed Lens Mount for OEM Applications, 12.1 mm Max Optic Thickness
AC254-100-AB1f = 100.0 mm, Ø1" Achromatic Doublet, ARC: 400 - 1100 nm
FMB2/M1Translation Baseplate for Ø12.7 mm and Ø25.4 mm OEM Fixed Optic Mounts
FMM05F/M1Ø12.7 mm Front-Loading Fixed Mirror Mount for OEM Applications
PF05-03-P011Ø1/2" Protected Silver Mirror
FMB1/M1Rotation Baseplate for OEM Fixed Optic Mounts
Figure 1.2  Thorlabs' line of Fixed Optic Mounts for OEM Applications include a selection of lens and mirror mount sizes and both rotation and translation bases. All mounts and bases are designed such that the optical axis height is maintained across the entire line of products.

Thorlabs' Fixed Optic Mounts for OEM Applications are designed to support a seamless transition from benchtop R&D to high-volume OEM laser system production. All mounts share a unified optical axis height, providing beam path consistency and interchangeability to help simplify prototype layout and production integration. Separate baseplates provide breadboard compatibility for prototyping flexibility and integration into full optical systems during the development phase. The fixed optic height and mechanical footprint allow for direct transfer of mounts into the proven system, with a cavity-ready form factor supporting direct mounting into custom laser system substructures. This overall architecture enables OEM designers to rapidly develop and iterate optical systems on standard breadboards, then deploy those exact assemblies in production environments with no change in alignment geometry, reducing validation requirements and increasing long-term system reliability.

For applications where kinematic adjustment is not needed, these internally SM-threaded fixed lens mounts offer a simple way to mount lenses and other optical components. They feature a built-in mounting flange and maintain a common mounting height across all sizes, making them ideal for OEM applications. Each mount is fabricated from unanodized 6061-T6 aluminum and double vacuum-bagged, making them suitable for cleanroom and vacuum chamber environments; vacuum specifications are provided in Table 1.1. As shown in Figure 1.2, these mounts share the same optical height as our fixed mirror mounts making them well-suited for OEM integration.

Fixed Lens Mounts for OEM Applications (FLM Series)
Thorlabs’ FLM Series of fixed lens mounts are available for Ø1/2", Ø1", and Ø2" optics. Each mount includes a retaining ring to secure the optic against the rear lip of the mount; see the Threading Specs tab to learn more about SM threading. Alternatively, the SM-threaded bore allows a variety of threaded optical components to be directly attached. Two through holes on the mounting flange accept 1/4" (M6) cap screws for mounting, including one tight-fit clearance hole for use with a shoulder screw to aid in repeatable positioning. Each optic size mount is offered in both standard and extra-thick versions, the latter designed to support thicker optics.

Baseplates for OEM Fixed Optic Mounts
To ensure compatibility with standard breadboards or optical tables, baseplates are available separately. Options include manual translation baseplates, which provide up to 1.5" (31.8 mm) of linear mount travel, and rotation baseplates, which offer up to 90° of rotational adjustment.


Click to Enlarge

Threading Specifications

The following is a general overview of screw threading. For more details regarding specifications and dimensions, please consult the Machinery's Handbook, available for purchase at many bookstores.

Features of a Thread
A thread consists of three repeating features: a crest, flank, and root (see drawing to the right). Except in special cases, threads have symmetrical sides inclined at equal angles when a vertical line is drawn through the center of a crest or root. The distance between corresponding points on adjacent threads is known as the pitch of the thread. The flank angle is defined as the angle the flank makes with a perpendicular ray drawn from the screw axis. Unless otherwise stated, threads have a flank angle of 30°, resulting in a total angle between flanks of 60°. Each feature is shown in the diagram to the right.

The major diameter is taken from the crests of a thread while the minor diameter is taken from the roots. For most screws, crests and roots do not terminate at a sharp point, so crest and root truncation values are included in the definitions of major and minor diameter. The pitch diameter is approximately halfway between the major and minor diameters.

Thread Form
A thread form is a set of rules that define the features' scale relative to one another. Common thread forms include the Unified Screw Thread Form, used in the United States of America and measured in imperial units, and the ISO Metric Screw Thread Form, used in many parts of the world and measured with the International System of Units. There are many thread forms in the Unified screw thread standard designated by either UN, which defines a flat root contour, or UNR, which defines a round root contour. These can be further described by appending more letters. For example, an extremely fine thread with a flat root contour is designated UNEF. Those forms which are not standardized by the Unified screw thread system are designated UNS.

Thread Series
Most screws are identified by their thread series. Thread series are denoted by the major diameter and density of threads. Unified threads specify density in threads per inch, while Metric threads specify the thread pitch. For example, in the Unified nomenclature, a 1/4"-20 cap screw has a 1/4" diameter barrel and the pitch is 20 threads per inch (TPI). In metric nomenclature, an M4 x 0.7 cap screw has a 4 mm barrel and the pitch is 1 thread per 0.7 mm. The term M4 x 0.7 is often shortened to just M4.

Unified Thread Class Tolerancing
Location Loose Optimal Strict
Internal 1B 2B 3B
External 1A 2A 3A
Metric Thread Tolerance Positions
Location Loose Optimal Strict
Internal - G H
External e or f g h
Metric Thread Tolerance Grades
Dimension Location Tolerance Gradesa
Minor Diameter Internal 4, 5, 6, 7, 8
Major Diameter External 4, 6, 8
Pitch Diameter Internal 4, 5, 6, 7, 8
External 3, 4, 5, 6, 7, 8, 9
  • The tolerance becomes looser as the grade increases. The underlined grades are used with normal lengths of thread engagement.

Thread Class
The tolerances and allowances on a thread series are given by a thread class. Unified thread classes are alphanumeric identifiers starting with a number from 1 through 3, where 1 is the loosest tolerance and 3 is the tightest, and either A for external threading or B for internal threading.

Metric threads have a slightly more complex tolerancing method that uses tolerancing grades, designated by a number 3 through 9; and tolerancing positions, which use letters e through h. Grades provide a measure of the tolerance itself: the smaller the number, the tighter the tolerance. Positions denote the distance of the tolerance from the pitch diameter. Uppercase positioning letters indicate internal threads while lowercase positioning letters indicate external threads.

Quoting from the Machinery's Handbook, 29th Edition, p. 1885: "To designate the tolerance class, the grade and position of the pitch diameter is shown first followed by that for the major diameter in the case of the external thread or that for the minor diameter in the case of the internal thread, thus 4g6g for an external thread and 5H6H for an internal thread. If the two grades and positions are identical, it is not necessary to repeat the symbols, thus 4g, alone, stands for 4g4g and 5H, alone, stands for 5H5H."

Thorlabs' SM Series Threads
Threading specifications for our SM threads, utilized in our lens tube and cage system components, are given below so that you can machine mating components to suit your application. Most SM series threads utilize a non-standard Unified thread form, indicated by the letters UNS, with a 30° flank angle and a thread class of 2A and 2B. The exception is our SM30 series thread, which is a Metric thread form with a 30° flank angle and a tolerance of 6H/6g. We also offer products with C-Mount and RMS threads, and the specifications for these threads are given below for reference. Please note that other manufacturers may have different tolerances for C-Mount and RMS threads. For other thread specifications that are not listed here, please contact Tech Support.

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0 UNS-2A Internal Thread, 0.535"-40.0 UNS-2B
Max Major Diameter 0.5340" Min Major Diameter 0.5350"
Min Major Diameter 0.5289" Min Pitch Diameter 0.5188"
Max Pitch Diameter 0.5178" Max Pitch Diameter 0.5230"
Min Pitch Diameter 0.5146" Min Minor Diameter (and 83.3% of Thread) 0.508"
Max Minor Diameter 0.5069" Max Minor Diameter (and 64.9% of Thread) 0.514"
RMS Threading: Objective, Scan, and Tube Lenses
External Thread, 0.800"-36.0 UNS-2A Internal Thread, 0.800"-36.0 UNS-2B
Max Major Diameter 0.7989" Min Major Diameter 0.8000"
Min Major Diameter 0.7934" Min Pitch Diameter 0.7820"
Max Pitch Diameter 0.7809" Max Pitch Diameter 0.7866"
Min Pitch Diameter 0.7774" Min Minor Diameter (and 83.3% of Thread) 0.770"
Max Minor Diameter 0.7688" Max Minor Diameter (and 64.9% of Thread) 0.777"
C-Mount Threading: Machine Vision Lenses, CCD/CMOS Cameras
External Thread, 1.000"-32.0 UN-2A Internal Thread, 1.000"-32.0 UN-2B
Max Major Diameter 0.9989" Min Major Diameter 1.0000"
Min Major Diameter 0.9929" Min Pitch Diameter 0.9797"
Max Pitch Diameter 0.9786" Max Pitch Diameter 0.9846"
Min Pitch Diameter 0.9748" Min Minor Diameter (and 83.3% of Thread) 0.966"
Max Minor Diameter 0.9651" Max Minor Diameter (and 64.9% of Thread) 0.974"
SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0 UNS-2A Internal Thread, 1.035"-40.0 UNS-2B
Max Major Diameter 1.0339" Min Major Diameter 1.0350"
Min Major Diameter 1.0288" Min Pitch Diameter 1.0188"
Max Pitch Diameter 1.0177" Max Pitch Diameter 1.0234"
Min Pitch Diameter 1.0142" Min Minor Diameter (and 83.3% of Thread) 1.008"
Max Minor Diameter 1.0068" Max Minor Diameter (and 64.9% of Thread) 1.014"
SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5 x 0.5 – 6H/6g Internal Thread, M30.5 x 0.5 – 6H/6g
Max Major Diameter 30.480 mm Min Major Diameter 30.500 mm
Min Major Diameter 30.371 mm Min Pitch Diameter 30.175 mm
Max Pitch Diameter 30.155 mm Max Pitch Diameter 30.302 mm
Min Pitch Diameter 30.059 mm Min Minor Diameter (and 83.3% of Thread) 29.959 mm
Max Minor Diameter 29.938 mm Max Minor Diameter (and 64.9% of Thread) 30.094 mm
SM1.5 Threading: Ø1.5" Lens Tubes
External Thread, 1.535"-40 UNS-2A Internal Thread, 1.535"-40 UNS-2B
Max Major Diameter 1.5339" Min Major Diameter 1.535"
Min Major Diameter 1.5288" Min Pitch Diameter 1.5188"
Max Pitch Diameter 1.5177" Max Pitch Diameter 1.5236"
Min Pitch Diameter 1.5140" Min Minor Diameter (and 83.3% of Thread) 1.508"
Max Minor Diameter 1.5068" Max Minor Diameter (and 64.9% of Thread) 1.514"
SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
External Thread, 2.035"-40.0 UNS-2A Internal Thread, 2.035"-40.0 UNS-2B
Max Major Diameter 2.0338" Min Major Diameter 2.0350"
Min Major Diameter 2.0287" Min Pitch Diameter 2.0188"
Max Pitch Diameter 2.0176" Max Pitch Diameter 2.0239"
Min Pitch Diameter 2.0137" Min Minor Diameter (and 83.3% of Thread) 2.008"
Max Minor Diameter 2.0067" Max Minor Diameter (and 64.9% of Thread) 2.014"
SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0 UNS-2A Internal Thread, 3.035"-40.0 UNS-2B
Max Major Diameter 3.0337" Min Major Diameter 3.0350"
Min Major Diameter 3.0286" Min Pitch Diameter 3.0188"
Max Pitch Diameter 3.0175" Max Pitch Diameter 3.0242"
Min Pitch Diameter 3.0133" Min Minor Diameter (and 83.3% of Thread) 3.008"
Max Minor Diameter 3.0066" Max Minor Diameter (and 64.9% of Thread) 3.014"
SM4 Threading: Ø4" Lens Tubes
External Thread, 4.035"-40 UNS-2A Internal Thread, 4.035"-40.0 UNS-2B
Max Major Diameter 4.0337" Min Major Diameter 4.0350"
Min Major Diameter 4.0286" Min Pitch Diameter 4.0188"
Max Pitch Diameter 4.0175" Max Pitch Diameter 4.0245"
Min Pitch Diameter 4.0131" Min Minor Diameter (and 83.3% of Thread) 4.008"
Max Minor Diameter 4.0066" Max Minor Diameter (and 64.9% of Thread) 4.014"

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SM05-Threaded Fixed Lens Mounts for OEM Applications

View Imperial Product List
Item #QtyDescription
FLM051Ø1/2" Fixed Lens Mount for OEM Applications, 0.14" Max Optic Thickness
LA4600-A1f = 100 mm, Ø1/2" UVFS Plano-Convex Lens, ARC: 350 - 700 nm
FMB11Rotation Baseplate for OEM Fixed Optic Mounts
View Metric Product List
Item #QtyDescription
FLM05/M1Ø12.7 mm Fixed Lens Mount for OEM Applications, 3.6 mm Max Optic Thickness
LA4600-A1f = 100 mm, Ø1/2" UVFS Plano-Convex Lens, ARC: 350 - 700 nm
FMB1/M1Rotation Baseplate for OEM Fixed Optic Mounts
Figure G1.1  FLM05 Fixed Lens Mount with a UV Fused Silica Plano-Convex Lens
  • Constructed from Unanodized Aluminum for Vacuum Applications
  • Internally SM05-Threaded for Ø1/2" (Ø12.7 mm) Optics
  • Common Optical Axis Height Ideal for OEM Applications
  • Available for Standard or Thick Optics
  • Built-In Mounting Flange for 1/4" (M6) Screws

These fixed optic mounts provide a simple solution for mounting lenses and other optical components. Each mount features an SM05-threaded (0.535"-40) bore for mounting Ø1/2" optics and other optical components. These mounts are offered in both a standard (Item # FLM05(/M)) and thick version (Item # FLM05T(/M)) to accommodate optics of varying thickness (See Table G1.2). Each mount includes a retaining ring which can be used to secure an optic against the rear lip of the mount. These mounts share a common optical axis height with our SM1- and SM2-threaded versions of these mounts as well as our series fixed mirror mounts for OEM applications, making them ideal for OEM integration.

For compatibility with breadboards and optical tables, please see Table G1.2 for recommended baseplates available separately below.

Table G1.2  Specifications
Item # Optic Size Clear Aperturea Max Optic Thickness Optical Axis Height Included Retaining Ring Suggested Spanner Wrench Suggested Spanner Bit Baseplate Compatibility
FLM05(/M) Ø1/2" (Ø12.7 mm) Ø0.44" (Ø11.0 mm) 0.14" (3.6 mm) 1.50" (38.1 mm) SM05RRV SPW603, SPW603L, or SPW801 SPB05 FMB2(/M) or FMB1(/M)
FLM05T(/M) 0.28" (7.1 mm)
  • This specification refers to the clear aperture of the retaining ring used to mount the optic.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
FLM05 Support Documentation
FLM05NEW!Ø1/2" Fixed Lens Mount for OEM Applications, 0.14" Max Optic Thickness
$50.00
Today
FLM05T Support Documentation
FLM05TNEW!Ø1/2" Fixed Lens Mount for OEM Applications, 0.28" Max Optic Thickness
$52.00
Today
+1 Qty Docs Part Number - Metric Price Available
FLM05/M Support Documentation
FLM05/MNEW!Ø12.7 mm Fixed Lens Mount for OEM Applications, 3.6 mm Max Optic Thickness
$50.00
Today
FLM05T/M Support Documentation
FLM05T/MNEW!Ø12.7 mm Fixed Lens Mount for OEM Applications, 7.1 mm Max Optic Thickness
$52.00
Today

SM1-Threaded Fixed Lens Mounts for OEM Applications

View Imperial Product List
Item #QtyDescription
FLM1T1Ø1" Fixed Lens Mount for OEM Applications, 0.48" Max Optic Thickness
AC254-100-AB1f = 100.0 mm, Ø1" Achromatic Doublet, ARC: 400 - 1100 nm
FMB21Translation Baseplate for Ø1/2" and Ø1" OEM Fixed Optic Mounts
View Metric Product List
Item #QtyDescription
FLM1T/M1Ø25.4 mm Fixed Lens Mount for OEM Applications, 12.1 mm Max Optic Thickness
AC254-100-AB1f = 100.0 mm, Ø1" Achromatic Doublet, ARC: 400 - 1100 nm
FMB2/M1Translation Baseplate for Ø12.7 mm and Ø25.4 mm OEM Fixed Optic Mounts
Figure G2.2  The FLM1T Fixed Lens Mount is designed for mounting of extra thick lenses as shown above for an achromatic doublet with a 10.5 mm edge thickness.
View Imperial Product List
Item #QtyDescription
FLM11Ø1" Fixed Lens Mount for OEM Applications, 0.28" Max Optic Thickness
AC254-100-AB1f = 100.0 mm, Ø1" Achromatic Doublet, ARC: 400 - 1100 nm
SM1L10V1Vacuum-Compatible SM1 Lens Tube, 1.00" Thread Depth, One Retaining Ring Included
FMB11Rotation Baseplate for OEM Fixed Optic Mounts
View Metric Product List
Item #QtyDescription
FLM1/M1Ø25.4 mm Fixed Lens Mount for OEM Applications, 7.1 mm Max Optic Thickness
AC254-100-AB1f = 100.0 mm, Ø1" Achromatic Doublet, ARC: 400 - 1100 nm
SM1L10V1Vacuum-Compatible SM1 Lens Tube, 1.00" Thread Depth, One Retaining Ring Included
FMB2/M1Translation Baseplate for Ø12.7 mm and Ø25.4 mm OEM Fixed Optic Mounts
Figure G2.1  The internal SM-threading on our fixed optic mounts can be used for direct mounting of lens tubes and other optical components.
  • Constructed from Unanodized Aluminum for Vacuum Applications
  • Internally SM1-Threaded for Ø1" (Ø25.4 mm) Optics
  • Common Optical Axis Height Ideal for OEM Applications
  • Available for Standard or Thick Optics
  • Built-In Mounting Flange for 1/4" (M6) Screws

These fixed optic mounts provide a simple solution for mounting lenses and other optical components. Each mount features an SM1-threaded (1.035"-40) bore for mounting Ø1" optics and other optical components. These mounts are offered in both a standard (Item # FLM1(/M)) and thick version (Item # FLM1T(/M)) to accommodate optics of varying thickness (See Table G2.3). Each mount includes a retaining ring which can be used to secure an optic against the rear lip of the mount. These mounts share a common optical axis height with our SM05- and SM2-threaded versions of these mounts as well as our series fixed mirror mounts for OEM applications, making them ideal for OEM integration.

For compatibility with breadboards and optical tables, please see Table G2.3 for recommended baseplates available separately below.

Table G2.3  Specifications
Item # Optic Size Clear Aperturea Max Optic Thickness Optical Axis Height Included Retaining Ring Suggested Spanner Wrench Suggested Spanner Bit Baseplate Compatibility
FLM1(/M) Ø1" (Ø25.4 mm) Ø0.90" (Ø22.9 mm) 0.28" (7.1 mm) 1.50" (38.1 mm) SM1RRV SPW606, SPW602, or SPW801 SPB1 FMB2(/M) or FMB1(/M)
FLM1T(/M) 0.48" (12.1 mm)
  • This specification refers to the clear aperture of the retaining ring used to mount the optic.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
FLM1 Support Documentation
FLM1NEW!Ø1" Fixed Lens Mount for OEM Applications, 0.28" Max Optic Thickness
$52.00
Today
FLM1T Support Documentation
FLM1TNEW!Ø1" Fixed Lens Mount for OEM Applications, 0.48" Max Optic Thickness
$54.00
Today
+1 Qty Docs Part Number - Metric Price Available
FLM1/M Support Documentation
FLM1/MNEW!Ø25.4 mm Fixed Lens Mount for OEM Applications, 7.1 mm Max Optic Thickness
$52.00
Today
FLM1T/M Support Documentation
FLM1T/MNEW!Ø25.4 mm Fixed Lens Mount for OEM Applications, 12.1 mm Max Optic Thickness
$54.00
Today

SM2-Threaded Fixed Lens Mounts for OEM Applications

View Imperial Product List
Item #QtyDescription
FLM21Ø2" Fixed Lens Mount for OEM Applications, 0.36" Max Optic Thickness
LB16301N-BK7 Bi-Convex Lens, Ø2", f = 100.0 mm, Uncoated
FMB31Translation Baseplate for Ø1.5" and Ø2" OEM Fixed Optic Mounts
View Metric Product List
Item #QtyDescription
FLM2/M1Ø50.8 mm Fixed Lens Mount for OEM Applications, 9.1 mm Max Optic Thickness
LB16301N-BK7 Bi-Convex Lens, Ø2", f = 100.0 mm, Uncoated
FMB3/M1Translation Baseplate for Ø38.1 mm and Ø50.8 mm OEM Fixed Optic Mounts
Figure G3.1  FLM2 Fixed Lens Mount with an N-BK7 Bi-Convex Lens
  • Constructed from Unanodized Aluminum for Vacuum Applications
  • Internally SM2-Threaded for Ø2" (Ø50.8 mm) Optics
  • Common Optical Axis Height Ideal for OEM Applications
  • Available for Standard or Thick Optics
  • Built-In Mounting Flange for 1/4" (M6) Screws

These fixed optic mounts provide a simple solution for mounting lenses and other optical components. Each mount features an SM2-threaded (2.035"-40) bore for mounting Ø2" optics and other optical components. These mounts are offered in both a standard (Item # FLM2(/M)) and thick version (Item #FLM2T(/M)) to accommodate optics of varying thickness (See Table G3.2). Each mount includes a retaining ring which can be used to secure an optic against the rear lip of the mount. These mounts share a common optical axis height with our SM05- and SM1-threaded versions of these mounts as well as our series fixed mirror mounts for OEM applications, making them ideal for OEM integration.

For compatibility with breadboards and optical tables, please see Table G3.2 for recommended baseplates available separately below.

Table G3.2  Specifications
Item # Optic Size Clear Aperturea Max Optic Thickness Optical Axis Height Included Retaining Ring Suggested Spanner Wrench Suggested Spanner Bit Baseplate Compatibility
FLM2(/M) Ø2" (Ø50.8 mm) Ø1.90" (Ø48.3 mm) 0.36" (9.1 mm) 1.50"
(38.1 mm)		 SM2RRV SPW604 or SPW801 SPB2 FMB3(/M) or FMB1(/M)
FLM2T(/M) 0.52" (13.1 mm)
  • This specification refers to the clear aperture of the retaining ring used to mount the optic.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
FLM2 Support Documentation
FLM2NEW!Ø2" Fixed Lens Mount for OEM Applications, 0.36" Max Optic Thickness
$63.00
Today
FLM2T Support Documentation
FLM2TNEW!Ø2" Fixed Lens Mount for OEM Applications, 0.52" Max Optic Thickness
$65.00
Today
+1 Qty Docs Part Number - Metric Price Available
FLM2/M Support Documentation
FLM2/MNEW!Ø50.8 mm Fixed Lens Mount for OEM Applications, 9.1 mm Max Optic Thickness
$63.00
Today
FLM2T/M Support Documentation
FLM2T/MNEW!Ø50.8 mm Fixed Lens Mount for OEM Applications, 13.1 mm Max Optic Thickness
$65.00
Today

Translation Baseplates for OEM Fixed Optic Mounts

Figure 803A  Translation Baseplates Provide Up to 1.25" of Manual Movement for Fixed OEM Optic Mounts
  • Attach OEM Fixed Optical Mounts via 1/4"-20 (M6 x 1.0) Square Nut
  • Mount on Breadboard or Optical Table via Clearance Hole for 1/4" (M6) Cap Screws
  • Translation Slot Provides Up to 1.25" (31.8 mm) Linear Translation

These baseplates provide compatibility between OEM fixed optic mounts and standard breadboards or optical tables. Each baseplate includes four counterbored mounting holes for 1/4" (M6) cap screws to secure it to the optical table. Optic mounts are attached using two 1/4"-20 (M6 x 1.0) square nuts inserted into the translation clearance slots on the baseplate. This configuration allows the mounts to be translated by up to 1.25" (31.8 mm) while the baseplate remains stationary, as shown in Figure 803A.

The FMB2(/M) translation baseplate is compatible with OEM fixed optic mounts designed for Ø1/2" (Ø12.7 mm) and Ø1" (Ø25.4 mm) optics. The FMB3(/M) translation baseplate is compatible with mounts designed for Ø1.5" (Ø38.1 mm) and Ø2" (Ø50.8 mm) optics.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
FMB2 Support Documentation
FMB2NEW!Translation Baseplate for Ø1/2" and Ø1" OEM Fixed Optic Mounts
$36.00
Today
FMB3 Support Documentation
FMB3NEW!Translation Baseplate for Ø1.5" and Ø2" OEM Fixed Optic Mounts
$36.00
Today
+1 Qty Docs Part Number - Metric Price Available
FMB2/M Support Documentation
FMB2/MNEW!Translation Baseplate for Ø12.7 mm and Ø25.4 mm OEM Fixed Optic Mounts
$36.00
Today
FMB3/M Support Documentation
FMB3/MNEW!Translation Baseplate for Ø38.1 mm and Ø50.8 mm OEM Fixed Optic Mounts
$36.00
Today

Rotation Baseplate for OEM Fixed Optic Mounts

Mirror Mounts on Rotating Baseplates
Click to Enlarge
View Imperial Product List
Item #QtyDescription
FMM05R1Ø1/2" Rear-Loading Fixed Mirror Mount for OEM Applications
FMM1R1Ø1" Rear-Loading Fixed Mirror Mount for OEM Applications
FMB12Rotation Baseplate for OEM Fixed Optic Mounts
DMLP6381Ø1" Longpass Dichroic Mirror, 638 nm Cut-On
DMLP638T1Ø1/2" Longpass Dichroic Mirror, 638 nm Cut-On
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Item #QtyDescription
FMM05R/M1Ø12.7 mm Rear-Loading Fixed Mirror Mount for OEM Applications
FMM1R/M1Ø25.4 mm Rear-Loading Fixed Mirror Mount for OEM Applications
FMB1/M2Rotation Baseplate for OEM Fixed Optic Mounts
DMLP6381Ø1" Longpass Dichroic Mirror, 638 nm Cut-On
DMLP638T1Ø1/2" Longpass Dichroic Mirror, 638 nm Cut-On
Figure 788A  Two Rear-Loading Mirror Mounts with Dichroic Mirrors Mounted on FMB1 Baseplates
  • Attach OEM Fixed Optic Mounts via 1/4"-20 (M6 x 1.0) Tapped Holes
  • Included Dowel Pin Adapter Provides Pivot Point for Rotation
  • Mount on Breadboard or Optical Table via Clearance Slot for 1/4" (M6) Cap Screws
  • Clearance Slot Provides Up to 90° Rotation 

The FMB1(/M) Rotation Baseplate provides compatibility between the OEM fixed optic mounts and standard breadboards or optical tables. Four 1/4"-20 (M6 x 1.0) tapped holes through the baseplate match the footprint of all sizes of the OEM fixed optic mounts. An included dowel pin adapter is threaded into the central 1/4"-20 (M6 x 1.0) tap, providing a pivot point about which the baseplate can rotate when placed in one of the holes of a breadboard or optical table. A curved clearance slot allows the baseplate to be secured to a breadboard or optical table and provides up to 90° of rotation without removing the mounting cap screw.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
FMB1 Support Documentation
FMB1NEW!Rotation Baseplate for OEM Fixed Optic Mounts
$34.00
Today
+1 Qty Docs Part Number - Metric Price Available
FMB1/M Support Documentation
FMB1/MNEW!Rotation Baseplate for OEM Fixed Optic Mounts
$34.00
Today
Additional Fixed Optic Mounts
  • Polaris OEM Fixed Mirror Mount

  • Polaris Fixed Optic Mounts

  • Fixed Mirror Mounts for OEM Applications

  • Fixed Lens Mounts for OEM Applications

  • Mirror Mounts

  • Lens Mounts

  • Adjustable Diameter Mounts

  • Self-Centering Mounts

  • Fixed Cage-Compatible Mounts

  • D-Shaped Mirror Mounts

  • Nested Mounts

  • Indexing Mounts

  • V-Mounts

  • Quick Release Mounts

  • Compact Platform Mounts

  • 45° Mirror Mounts

  • Fixed Pellicle Mounts

  • Fixed Mounts for Square and Rectangular Optics

  • Brewster Window Mounts

  • Manual and Motorized Flip Mounts

  • One-Axis Kinematic Adapter for Fixed Mounts

  • Mounts for Keyway Stages

  • Adapters

  • Lens Tubes

  • Component Mounts