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Post Mounting Angle Blocks


  • Angle Blocks for Twelve Discrete Angles from 4° to 54.7°
  • 8-32 (M4) Tapped Hole or #8 (M4) Counterbore on Top
  • Ø1/2" and Ø1" (Ø25 mm) Post Mountable
  • 35.3° and 54.7° Angle Blocks for Magic Angle Pump-Probe Experiments

#8 (M4) Counterbore

8-32 (M4) Tapped Hole

8-32 (M4) Tapped Hole

Application Idea

KS05 Mirror Mount on an AM16C 16° Angle Block

AM16C

16°

AM8T

AM353T

35.3º (Magic Angle)

Related Items


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Polarizer at Magic Angle
Click to Enlarge

This photo shows a GL15-B Glan-Laser Polarizer secured to a KM100B Platform Mount by a PM3 Clamping Arm. The AM353T Angle Block helps orient the polarizer at a 35.3° angle.

Our Angle Blocks can be used to orient mirror mounts and other optomechanics at several fixed angles from 4° to 54.7°. They are available with either an 8-32 (M4) tap on top or a #8 (M4) counterbore on top. The bottom of the angle block has an 8-32 (M4) tapped hole for our Ø1/2" and Ø1" (Ø25 mm) posts. They are manufactured from black-anodized aluminum and are engraved with the part number for easy identification of the angle.

Application Note: The Magic Angle
Our 35.3° and 54.7° angle blocks are designed to help orient polarizers in rectangular housings, such as Glan-Laser polarizers, at the magic angle used in certain ultrafast pump-probe measurements. In this family of experiments, which includes fluorescence lifetime measurements, transient absorption spectroscopy, and vibrational spectroscopy, it is advantageous to polarize the probe beam at the magic angle of 54.7° (relative to the pump beam's polarization). This angle makes the probe beam insensitive to unwanted anisotropies that would otherwise be convolved with the measured signal.

When using Thorlabs' Glan-Laser polarizers, we recommend securing the polarizer to a Kinematic Platform Mount, as shown in the photo to the right. The kinematic mount enables fine angle tuning and leaves a large clear edge around the polarizer, making it easier to maintain overlap of the pump and probe beams through the sample. In the photo, a 35.3° angle block is used, which requires the pump beam to be vertically polarized; this configuration allows the clamping arm to avoid touching the sides of the housing that have escape windows.

For ultrafast experiments, Thorlabs also offers 100 mm and 220 mm optical delay line kits, as well as low-GDD dielectric mirrors.


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Posted Comments:
Poster:besembeson
Posted Date:2015-09-23 10:03:22.0
Response from Bweh at Thorlabs USA: Thanks for the feedback. We will review this.
Poster:tmagnan2
Posted Date:2015-07-08 16:59:21.183
For ultrafast measurements/applications, having a block like one of these set to magic angle and/or its complement (54.7 or 35.3 deg.) would be rather useful. It would serve as an efficient and economic way to set the angle of a polarizer to eliminate the effects of polarization anisotropy. Just a thought, thanks!
Poster:bdada
Posted Date:2012-02-13 19:04:00.0
Response from Buki at Thorlabs to acable: Thank you for participating in our feedback forum. You raise a valid point and we have passed this on to our production team. Depending on what you want to mount at 45 degrees, there may be a few alternative solutions for you to consider in the short term: 1. MA45-2 - 45° Mounting Adapter, on which you can mount our KM100 or KM200 mirror mount 2. H45B2 - 45° Optic Holder for 1" diameter optics The product page below has more information on these products: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=785
Poster:acable
Posted Date:2012-02-13 12:46:41.0
Seems like you stopped short of the most useful angle, can you add a 45 degree design.
Poster:bdada
Posted Date:2012-02-02 19:12:00.0
Response from Buki at Thorlabs: Thank you for participating in our feedback forum. The angle blocks are made from aluminum, which is non-magnetic. This information is included in the bottom right corner of the drawing linked below: http://www.thorlabs.com/Thorcat/22200/22297-E0W.pdf
Poster:shane
Posted Date:2012-02-02 17:14:37.0
Could you tell me what materials are used in these? We have an application for which we need non-magnetic parts. Thanks.

Tapped Post Mounting Angle Blocks

  • Top Surface has an 8-32 (M4) Tapped Hole for Attaching Optomechanical Components
  • Bottom Surface has an 8-32 (M4) Tapped Hole
  • 4°, 8°, 16°, 24°, 30°, 32°, 35.3°, 40°, 45°, and 54.7° Versions Available

These Angle Blocks contain an 8-32 (M4) tapped hole that is designed to mate with optomechanical components that have a counterbored mounting hole, such as our Kinematic Platform Mounts and most of our Kinematic Mirror Mounts. The bottom of the angle block has an 8-32 (M4) tapped hole for post mounting.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
AM4T Support Documentation
AM4TCustomer Inspired!4° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM8T Support Documentation
AM8TCustomer Inspired!8° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM16T Support Documentation
AM16TCustomer Inspired!16° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM24T Support Documentation
AM24TCustomer Inspired!24° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM30T Support Documentation
AM30TCustomer Inspired!30° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM32T Support Documentation
AM32TCustomer Inspired!32° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM353T Support Documentation
AM353TCustomer Inspired!35.3° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM40T Support Documentation
AM40TCustomer Inspired!40° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM45T Support Documentation
AM45TCustomer Inspired!45° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
AM547T Support Documentation
AM547TCustomer Inspired!54.7° Angle Block, 8-32 Tap, 8-32 Post Mount
$18.50
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
AM4T/M Support Documentation
AM4T/MCustomer Inspired!4° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM8T/M Support Documentation
AM8T/MCustomer Inspired!8° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM16T/M Support Documentation
AM16T/MCustomer Inspired!16° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM24T/M Support Documentation
AM24T/MCustomer Inspired!24° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM30T/M Support Documentation
AM30T/MCustomer Inspired!30° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM32T/M Support Documentation
AM32T/MCustomer Inspired!32° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM353T/M Support Documentation
AM353T/MCustomer Inspired!35.3° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM40T/M Support Documentation
AM40T/MCustomer Inspired!40° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM45T/M Support Documentation
AM45T/MCustomer Inspired!45° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today
AM547T/M Support Documentation
AM547T/MCustomer Inspired!54.7° Angle Block, M4 Tap, M4 Post Mount
$18.50
Today

Counterbored Post Mounting Angle Blocks

  • Top Surface has a #8 (M4) Counterbore for Attaching Optomechanical Components
  • Bottom Surface has an 8-32 (M4) Tapped Hole for Posts
  • 4°, 8°, 16°, 24°, 30°, 32°, 35.3°, 40°, 45°, and 54.7° Versions Available

These Angle Blocks contain a #8 (M4) counterbore that is designed to mate with optomechanical components that have a tapped mounting hole, such as our KM05(/M) Ø1/2" Kinematic Mirror Mount and Fixed Lens Mounts. The bottom of the angle block has an 8-32 (M4) tapped hole for post mounting.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
AM4C Support Documentation
AM4CCustomer Inspired!4° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM8C Support Documentation
AM8CCustomer Inspired!8° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM16C Support Documentation
AM16CCustomer Inspired!16° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM24C Support Documentation
AM24CCustomer Inspired!24° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM30C Support Documentation
AM30CCustomer Inspired!30° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM32C Support Documentation
AM32CCustomer Inspired!32° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM353C Support Documentation
AM353CCustomer Inspired!35.3° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM40C Support Documentation
AM40CCustomer Inspired!40° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM45C Support Documentation
AM45CCustomer Inspired!45° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
AM547C Support Documentation
AM547CCustomer Inspired!54.7° Angle Block, #8 Counterbore, 8-32 Post Mount
$18.50
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
AM4C/M Support Documentation
AM4C/MCustomer Inspired!4° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM8C/M Support Documentation
AM8C/MCustomer Inspired!8° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM16C/M Support Documentation
AM16C/MCustomer Inspired!16° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM24C/M Support Documentation
AM24C/MCustomer Inspired!24° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM30C/M Support Documentation
AM30C/MCustomer Inspired!30° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM32C/M Support Documentation
AM32C/MCustomer Inspired!32° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM353C/M Support Documentation
AM353C/MCustomer Inspired!35.3° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM40C/M Support Documentation
AM40C/MCustomer Inspired!40° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM45C/M Support Documentation
AM45C/MCustomer Inspired!45° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
AM547C/M Support Documentation
AM547C/MCustomer Inspired!54.7° Angle Block, M4 Counterbore, M4 Post Mount
$18.50
Today
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