Cuvette Holder with Four Light Ports

  • For Standard Macro and Micro Cuvettes
  • 4 Light Ports for Fiber and Free Space
  • Includes Filter Holder for Mounted Ø1" Filters


Cuvette Sold Separately


SMA905 Fiber Adapter with Lens Mount,
Spacers, and Retaining Ring

Flexible Mounting Options


Cover for the CVH100

Related Items

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optical axis of cuvette holder
The optical axes (blue) are perpendicular with a crossing point that is mutually perpendicular with the vertical mounting axis (red). With this orientation, the alignment remains unchanged even if the holder is turned. For more views, please see the Alternate Views tab above.


  • Accommodates Super Micro, Micro, or Macro Cuvettes
  • Compatible with 12.5 mm x 12.5 mm x 45 mm Cuvettes with a Z-Dimension (Beam Height) of 8.5 mm
  • SM1 (1.035"-40) and 30 mm Cage Compatible
  • Post Mountable via 1/4"-20 (M6) Tap
  • Light-Tight Cover Available

Designed to accommodate standard micro and macro cuvettes, the CVH100 Cuvette Holder can be used in fiber or free-space applications. The holder is compatible with 12.5 mm x 12.5 mm x 45 mm (0.49" x 0.49" x 1.77") cuvettes and features four SM1-compatible (1.035"-40) light ports, thereby offering two perpendicular light paths for transmission and fluorescence measurements. Both optical axes (blue lines in the photo to the right) and the axis for the post mount (red in the photo to the right) have a common crossing intersection point, which allows the user to turn the holder to use another port while maintaining the alignment to the optical axes in free space applications.

When purchasing small volume or window cuvettes, a 'Z' dimension is often specified. This 'Z' dimension is the length from the bottom of the cuvette to the center of the sample chamber window on the cuvette. The CVH100 and the included fiber adapter are designed such that the beam height will be 8.5 mm above the bottom of the cuvette (see the Specs tab for a diagram).

Filter Holder
The CVH100 cuvette holder includes one CVH100-FH filter holder, which is designed to house Ø1" mounted filters measuring up to 7 mm in thickness. These filters are typically used to achieve wavelength isolation for incident or emitted radiation. The filter holder is located between the cuvette and one of the ports. Additional CVH100-FH filter holders can be ordered separately, thereby enabling quick exchange of filters.

Fiber Adapter
The holder is shipped with a collimating SMA-to-SM1 fiber adapter, allowing the cuvette holder to be directly connected to fiber-based light sources, detectors, or spectrometers. We recommend our multimode patch cables for interconnection. An uncoated B270 collimating optic is included. Two SM1-threaded end caps are also included so that unused ports can be covered to prevent dust from entering the optomechanical assembly.

Ports of the Cuvette Holder

Input light port
Input light port with 9 mm x 14 mm slotted hole
Output light port
Output light port with Ø12 mm round hole
2nd axis light port
Ports of the 2nd optical axis with Ø9 mm round hole

Light-Tight Cover
A light-tight cover for the cuvette holder is available for applications that are particularly sensitive to light. This cover is compatible with cuvettes up to 50 mm (1.96") tall, including the stopper, as well as with the filter holder included with the cuvette holder. 

All four access ports on the cuvette holder are equipped with four 4-40 taps for compatibility with our 30 mm cage systems and a single bore that has internal SM1 (1.035"-40) threading for direct mounting to our lens tubes or other SM1-compatible products such as our OSL2 white light source or our mounted high-power LEDs. The CVH100 can be post mounted using the 1/4"-20 (M6) mounting hole on the bottom of the cuvette holder. The black anodized aluminum coating protects the mount from corrosion in typical lab environments.

Thorlabs offers a selection of synthetic quartz glass cuvettes for use with our cuvette holder. These high-quality cuvettes transmit light down to 200 nm and are available in macro, micro, and super micro sizes for 3500 µL, 1400 µL, 700 µL, and 100 µL samples. They are available in versions with two polished windows for absorption spectroscopy or four polished windows for fluorescence spectroscopy where the measurement of the signal is at right angles to the beam path.

Alternate Cuvette Holders
For additional in-line cuvette and filter mounting capabilities, please see our Fiber Optic Filter and Cuvette Mounts.

CVH100 Filter Holder
Click to Enlarge

Cuvette Z-Axis (Optical Axis Height Above Base)
Item # CVH100 CVH100/M
Compatible Cuvette Properties
Outer Cuvette Dimensions 12.5 mm x 12.5 mm x 45 mm (0.49" x 0.49" x 1.77")
Cuvette Types Macro and Micro Cuvettes with 10 mm (0.39") Light Path
Cuvette "Z" Dimension
(Optical Axis Height Above Cuvette Base)a
8.5 mm (0.33")
Window Sizes
Input (Main Optical Axis) 9 mm x 14 mm (0.35" x 0.55")
Output (Main Optical Axis) Ø12 mm (0.47")
Side Ports (Secondary Optical Axis) Ø9 mm (Ø0.35")
In-Line Filter Holderb Mounted Ø1" (Ø25.4 mm) Filters
Filter Thickness (Max) 7 mm (0.28")
Fiber Port SMA (removable)
Collimator Lens Uncoated Glass, B270
Main Optical Axis Sunk SM1 Internal Thread (Optimized for Lens Tubes)
30 mm Cage System
Secondary Optical Axis
(90° to Main Axis)
SM1 Internal Thread
30 mm Cage System
Post Mount 1/4"-20 M6
General Specs
Material (Main Body / Collimator) Aluminum Black Anodized / Stainless Steel
Weight 280 g (0.617 lbs)
Dimensions without Collimator (W x H x D)c 44 mm x 42 mm x 49 mm (1.73" x 1.65" x 1.93")
Dimensions with Collimator (W x H x D)c 44 mm x 42 mm x 60 mm (1.73" x 1.65" x 2.38")
  • Dimension Shown in the Diagram to the Right
  • Filters Sold Separately
  • Height with Filter Holder: 1.97" (50 mm)


CVH100 Side View
Click to Enlarge

Side view cross section showing the position of the mechanical
axis (red) and an optical axis (blue).
CVH100 Top View
Click for Details

Top view cross section showing ray trace of beam through system and possible signals for spectroscopic measurements.

Exploded View

CVH100 Exploded View
Click to Enlarge

Exploded view showing how the CVH100 components are assembled. The cuvette is sold separately.

Posted Comments:
Taeho Shin  (posted 2022-11-22 11:20:07.24)
Hello, sir. I bought a CVH100 recently. A collimating lens of B270 is included in the adapter, but I couldn't find its spec. Please let me know about the spec of B270 such as working wavelengths. Thanks.
wskopalik  (posted 2022-11-22 04:43:35.0)
Thank you very much for your feedback! The lens is uncoated and made of B270. This is an optical crown glass which transmits light between 380 - 2100 nm. The lens shape is optimized for the visible spectral range. I will contact you directly to provide further assistance.
Fabio Rizzo  (posted 2022-04-07 11:28:13.74)
I would like to know if the CVH100-COL can be used in combination with cage plates, either CP33 or CP8T. Thanks
mdiekmann  (posted 2022-04-08 07:19:04.0)
Yes, this is possible. The external SM1 thread can be connected directly to the internal SM1 thread on the cage plates.
les.tack  (posted 2018-05-17 18:29:57.99)
Are any of the 4 port cuvette products offered with FC/PC input? This would be for my light source.
YLohia  (posted 2018-08-01 04:24:03.0)
Thank you for your inquiry. At the moment we can only offer the included collimator with SMA connector. You could connect a SM1FC fiber adapter directly to one of the cuvette holder ports. Alternatively, a custom collimator could be build using a fiber adapter, lens tube and plano-convex lens. In addition, the included collimator could be used with a FC/PC to SMA hybrid patch cable.
t.ding  (posted 2017-08-08 22:35:59.21)
If you can make it temperature controllable, I would rate it very useful. Is it possible if you can provide such a product? I think it be even more popular as it provides online monitoring of chemistry process where temperature control and stiring takes place.
mdiekmann  (posted 2017-08-16 09:55:16.0)
This is a response from Meike at Thorlabs: Thank you for your feedback! We might consider to release a temperature controlled version in the future, so we would be interested to learn more about your application. I will contact you directly to discuss this further.
messinat  (posted 2017-04-06 10:44:57.193)
I have a single photon counting module with an FC/APC fiber. Is it possible to get a CVH100-COL made with this fiber connection rather than SMA? Thanks, Troy
swick  (posted 2017-04-10 03:30:34.0)
This is a response from Sebastian at Thorlabs. Thank you for the inquiry. At the time we do not offer CVH100-COL with FC/APC adapter. For using FC/APC fiber patch cables with cuvette holder CVH100 our standard collimators for FC/APC would be suitable. One of the ports with SM1 thread can be used for mounting. I will contact you directly for assistance.  (posted 2015-09-11 10:37:45.69)
Dear Throlabs team, I´m looking to set up an application using this cuvette holder CH. I have a 980 nm laser which ends at standard SMA conexion fiber with 0,22 NA , I want to connect it to the CH, and in 90 degrees measure fluorescence. I want a filter in the signal exit low pass 900 or 950nm to ensure source light does not reaches detector. Also, I want to collimate light both at entrance and exit to ensure optimal excitation and maximum signal. Last, I need a base to hold the system. I though on the following configuration but I need your help on this: CVH-100/M 2x CVH100-COL 2x LA 1074 2x SM1CP2M (I believe system comes with two by default) CVH100-FH (is it included in CH?) FESH0950 and or FESH0750 (stil have to verify, but are those compatible?) TR4 PH40/M BA1/M And last one optic fibers, round to slit since slit is the enter of spectrometer BFL200HS02 Will really appreciate your feedback. Best Regards,
shallwig  (posted 2015-09-11 07:06:16.0)
This is a response from Stefan at Thorlabs. Thank you very much for your interest in our products. We will contact you directly to discuss your application in detail.
jvigroux  (posted 2012-07-02 11:32:00.0)
A response from Julien at Thorlabs: Thank you for your positive feedback! We are more than happy to have been able to provide you with a product that can reduce the effort required to perform your measurement. This is what we strive for!
cbrideau  (posted 2012-06-29 20:33:15.0)
I just wanted to say how happy our lab has been with this product. We use it frequently for fluorescent dye characterization. The flexibility of the 4 ports has been a big help for coupling different light sources into the cube. Also, I've bought quite a few of those spare filter holders and they are proving very convenient!
bdada  (posted 2011-10-05 17:58:00.0)
Response from Buki at Thorlabs: Thank you so much for your feedback! We will definitely keep it in mind as we continue expanding our product line of Microscopy products.
mmancini  (posted 2011-10-05 15:37:03.0)
I love this product and have recommended it to several people already. It's compact, flexible to meet my changing experimental needs, integrates wonderfully with my other optical components, and looks and acts more expensive than it sells for. Bravo.
jjurado  (posted 2011-07-18 11:03:00.0)
Response from Javier at Thorlabs to damien.decourten: Thank you very much for contacting us. For this application, it may be recommendable to use an achromatic doublet lens to increase the collection efficiency, and to achieve a tighter focus spot onto the active area of the photodiode. The CVH100 features four SM1-threaded light ports, to which you can couple a lens tube for housing the lens, and an adapter for the photodiode. I will contact you directly to discuss the details of your application. Achromatic lenses:
damien.decourten  (posted 2011-07-13 15:03:37.0)
Hi, I bought this device that works great. But I need now to implement it with very low light intensity. I would like to use this device directly with a (preamplified) photodiode for 90° fluoreseence measurements. What are your recommandations using a colimating lens before the photodiode for collecting as much emitted light as possible and a cage system/lens tube for holding everything together? Thanks
jjurado  (posted 2011-03-29 17:43:00.0)
Response from Javier at Thorlabs to cbrideau: Thank you very much for your feedback. We can certainly offer additional filter cartridges for this cuvette holder. I will contact you directly with a quotation.
cbrideau  (posted 2011-03-29 14:41:42.0)
I bought this device and it is working out quite well. Would I be able to get additional filter cartridges? The 1" filter holder works quite well, but when I need to change filters I would prefer to have them pre-mounted in additional cartridges. Can you offer the 1" filter holder as a separate item so I can buy more?
bdada  (posted 2011-03-08 12:06:00.0)
Response from Buki: Thank you for your feedback. The CCS series of USB spectrometers come with an SMA connectorized fiber that can be connected to the CVH100 cuvette holder via an SMA to SM1 fiber adapter included with the CVH100. Alternatively, you can connect the SMA connectorized fiber to the CVH100-COL, an SMA to SM1 adapter that lets you mount a lens of your choice. More information is available in the Overview section of this page: Please contact with additional questions you may have.
lmorgus  (posted 2011-03-07 14:29:00.0)
A response from Laurie at Thorlabs to the previous poster: Thank you for letting us know that one of the links on our website was broken. The box on our visual navigation system now links to the appropriate page. I apologize for the inconvenience of needing to find the product through a different search mechanism.
user  (posted 2011-03-07 13:35:59.0)
Link to this, from the 30-mm cage system page, is broken
user  (posted 2011-03-07 11:23:02.0)
How can the CVH100 be used with the USB spetrometer? Thanks!
Thorlabs  (posted 2010-07-30 13:54:35.0)
Response from Javier at Thorlabs to jhsu: Thank you for your feedback. We currently do not offer an FC version of the CVH100-COL. I will discus the development of this product with our design engineers, and keep you informed of the status.
jhsu  (posted 2010-07-29 23:59:50.0)
Dear Thorlabs: Its great to know that you release new product: Cuvette Holder with Four Light Ports. Can you also have the option of FC conenctor port. Thanks. Ray
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Cuvette Holder with Fiber Adapter

The CVH100 Cuvette Holder, which includes an interchangeable SMA Fiber Adapter and one CVH100-FH Filter Holder, offers a compact means for performing spectroscopic measurements. Designed to hold 12.5 mm x 12.5 mm x 45 mm cuvettes with a "Z" dimension of 8.5 mm (see the Specs tab), this cuvette holder provides four SM1-compatible (1.035"-40) side light ports for use with our SM1 Lens Tube products, facilitating light-tight applications when paired with the cover sold below. For quick filter exchanges, additional Ø1" filter holders (Item # CVH100-FH) are available separately.

The cuvette holder includes a fiber adapter designed to collimate the output from an SMA-terminated fiber with a fixed, non-removable, uncoated B270 collimating optic (f=8 mm, NA=0.547). For applications requiring a different lens, the fiber adapter can be replaced by the optional CVH100-COL fiber adapter (available below), which can mount any unmounted Ø1/2", plano-convex collimating lens.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
CVH100 Support Documentation
CVH100Customer Inspired! Cuvette Holder for Micro & Macro Cuvettes with SMA905 Fiber Adapter, 30 mm Cage Cube Compatible
+1 Qty Docs Part Number - Universal Price Available
CVH100-FH Support Documentation
CVH100-FHCustomer Inspired! Additional Ø1" Mounted Filter Holder
+1 Qty Docs Part Number - Metric Price Available
CVH100/M Support Documentation
CVH100/MCustomer Inspired! Cuvette Holder for Micro & Macro Cuvettes with SMA905 Fiber Adapter, 30 mm Cage Cube Compatible, Metric Post Tap
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SMA-to-SM1 Fiber Adapter with Lens Mount

Click to Enlarge
Lens is Not Included with the CVH100-COL
  • SMA905-to-SM1 Fiber Adapter for the CVH100(/M) Cuvette Holder
  • Internal SM05 (0.535"-40) Threads for Mounting a Ø1/2" Plano-Convex Lens Into the Beam Path
  • External SM1 (1.035"-40) Threads Compatible with Side Ports on CVH100(/M)
  • Includes 6.8 mm and 9.6 mm Long Spacer Rings and a SM05RR Retaining Ring

The CVH100-COL SMA905-to-SM1 Fiber Adapter with Lens Mount allows the user to mount any unmounted Ø1/2" plano-convex lens and insert it into the beam path for collimation. This adapter can be used in place of the SMA905 fiber adapter included with the CVH100(/M). Use this option to optimize the fiber coupling for specialized setups (e.g., coupling into a large core diameter multimode fiber or if an AR-coated collimating lens is required).

The CVH100-COL ships with 6.8 mm and 9.6 mm spacer rings and a SM05RR retaining ring to secure the lens. Please note that lenses must be purchased separately; please see the table below for a list of recommended lenses. To safely secure the retaining ring, we recommend using either the SPW603 or SPW603L spanner wrench. Please note that plano-convex lenses should be mounted with the plano side facing the fiber (see the drawing to the right).

Lens Item # Material Transmitted Wavelengths Spacer
LA1074 N-BK7 350 nm - 2.0 μm 6.8 mm
LA4647 UV Fused Silica 185 nm - 2.1 μm 6.8 mm
LA5315 CaF2 180 nm - 8.0 μm 6.8 mm
LA0506-E BaF2 3 - 5 μm 9.6 mm
LA8126-E Si 3 - 5 µm 9.6 mm
LA7733-G ZnSe 8 - 12 µm 9.6 mm
LA9015-F Ge 8 - 12 µm 9.6 mm
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CVH100-COL Support Documentation
CVH100-COLSMA-to-SM1 Fiber Adapter with 1/2" Lens Mount
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Cuvette Holder Cover

CVH100 Topper
Click to Enlarge
Fits Cuvettes up to 50 mm (1.96") Tall
  • Light-Tight Cover for the CVH100(/M)
  • Accommodates Cuvettes up to 50 mm (1.96") Tall, Including the Stopper
  • Made of Polystyrene

The CVH100-CV Cuvette Holder Cover is a light-tight cover for the CVH100(/M) cuvette holder. The purpose of this cover is to protect the cuvette from stray and ambient light that would enter from the top of the cuvette holder. When combined with threaded caps (SM1CP2) on the unused ports, this cover can be used to create a light-tight setup.

The cuvette holder cover is able to accommodate cuvettes up to 50 mm (1.96") tall, including the cap or plug, as well as the filter holder included with the CVH100(/M). When a 50 mm tall cuvette is used, there will be 1 mm of clearance between the cuvette stopper and the cover, as seen in the image to the right.

This cover does not effect the cage-compatibility of the cuvette holder, as it does not overhang the upper cage rod holes.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CVH100-CV Support Documentation
CVH100-CVLight-Tight Cover for CVH100(/M) Cuvette Holder