PrismMaster®
Goniometer for high-precision optical angle measurements
PrismMaster® goniometers are used for high-precision optical angle measurements on prisms, polygons and wedges. Even after more than 20 successful years on the market, the PrismMaster® 300 HR from TRIOPTICS continues to set the standard for accuracy in the industry. The overall concept of the PrismMaster® series follows a simple philosophy: providing an instrument with unrivalled accuracy which is also easy to use.
Product Overview
PrismMaster® 300 HR
The world’s most accurate angle measurement device

When accuracy really matters, there is no alternative to the PrismMaster® 300 HR. With an accuracy of 0.25 arc seconds, it remains the world’s most accurate angle measurement device for prisms.
Outstanding absolute accuracy achieved in a single measurement
Measurement of a large variety of samples including microprisms with a minimum sample size of 1.5 mm²
Ultra-stable and accurate rotary air bearing
Stable granite frame for all measuring parts.
- Measurement table in three different heights for easy adaption of different sample diameters and heights
PrismMaster® 300
Versatile automatic precision goniometer

The TRIOPTICS PrismMaster® 300 is a high precision and versatile automatic goniometer for angular measurements of prisms, polygons and wedges. It offersa number of innovative features:
High accuracy of 0.5 arcseconds
Stable granite frame for all measuring parts
Measurement table in three different heights
Outstanding absolute accuracy achieved in a single measurement
- Measurement of a large variety of samples including microprisms
- Ultra-stable and accurate rotary air bearing
PrismMaster® 150 HR
Economical and compact goniometer

The PrismMaster® 150 HR is characterised by high efficiency and compact dimensions. It is ideal for optical workshops as well as receipt and final inspection in production environments.
For a large variety of samples including microprisms with a minimum sample size of 1.0 mm²
Stable granite and steel frame for all measuring parts
Compact design with full system integration and single-cable connection
Outstanding absolute accuracy achieved in a single measurement
Ultra-stable and accurate rotary air bearing
PrismMaster® 150 MAN
Manual, Compact Goniometer

The PrismMaster® 150 MAN is a manual compact goniometer
Angular measurements of prisms, polygons and wedges
Ideal for receipt and final inspection in production environments
Low installation requirements
Outstanding absolute accuracy achieved in a single measurement
- No compressed air required due to accurate ball bearing and high performance angular encoder
- Compact design with full system integration and single-cable connection
PrismMaster® 300 HR MAX
Automatic goniometer for large samples

The PrismMaster® 300 HR MAX rounds off the product range with a system for measurement of large samples
Measurement of a large variety of samples
Samples diameter of up to 420 mm
Motorized z-stage
Outstanding absolute accuracy achieved in a single measurement
Ultra-stable and accurate rotary air bearing
PrismMaster® Flex
Highly flexible goniometer for quality control

The PrismMaster® Flex is a flexible and versatile configurable goniometer with a modular product concept.
Fast and easy quality control of prisms and plano optics in optics manufacturing
Three configuration levels: PrismMaster® Flex, 1D and 2D
Measurement in reflection for outer prism angles and in transmission for deflection angles
Basic configuration as comparison goniometer for production-related quality testing of prisms and plano optics, measurement times of less than 1 sec per sample
Configuration levels “1D” and “2D” for angle measurement in absolute values up to measurement of spatial angular relationships
Up to two additional (auto-)collimators as options for all configuration levels
Mechanical ball bearing, no compressed air required

Applications
PrismMaster®
Angle measurements of polygons, prisms and wedges
Surface tilt errors of prism and polygons
Wedge errors of optical windows
Angles of microprisms
Pyramidal errors
Angular gauge block
PrismMaster® Flex
Comparison measurement of surface angle
With optional additional collimator:
Comparison measurement of deflection angle
Absolute measurement of parallelism of plane parallel plates
With optional additional autocollimator:
Comparison measurement on two surfaces
An encoder in the swivel arm offers the following measurement possibilities:
Surface angle
Tilt angle
With optional additional collimator:
Deflection angle/transmission angle
Parallelism of plane parallel plates
With optional narrowband lightsource
Refractive index
An additional encoder in the rotary table enables further measurement applications:
Spatial angular relationships
Wedge orientation
Tilt angle of strongly inclined surfaces
Pyramidal angle
With optional additional collimator and autocollimator:
Beamsplitter cube
Software
PrismMaster® Software
Measuring Process of a Standard Sample
There is no easier way of achieving an immediate and ultra-accurate angle value of plano-optic components. The new software provides fully automated measurement of standard prisms and polygons:
Prism Configurator for the easy definition of non-standard and compound prisms
Software-automated sample tilt compensation (emulated tilt table) for quick and precise measurement of prism angles and pyramidal errors without laborious adjustments
Input of tolerance ranges and pass/fail classifications
Evaluation, display and recording of the measurement results according to ISO
Technical Data
Parameter | PrismMaster® 300 HR | PrismMaster® 300 | PrismMaster® 150 HR | PrismMaster® 150 MAN | PrismMaster® 300 HR MAX | PrismMaster® Comparison | PrismMaster® Flex |
---|---|---|---|---|---|---|---|
System accuracy | 0.25 arcsec | 0.5 arcsec | 1.0 arcsec | 1.2 arcsec | 0.4 arcsec | 1.5 arcsec | 1.5 arcsec1),2) |
Tilt angle measurement | on request | on request | on request | on request | 1.5 arcsec | ||
Pyramidal error | 1 arcsec | 1 arcsec | 3 arcsec | 5 arcsec | 1 arcsec | ||
Bearing of the sample table | air bearing | air bearing | air bearing | ball bearing | air bearing | ball bearing | ball bearing |
Rotation of the sample table | automatic | automatic | automatic | manual | automatic | manual | manual |
Max. sample size | dia. 225 mm | dia. 225 mm | dia. 120 mm | dia. 120 mm | dia. 420 mm | dia. 110 mm | dia. 120 mm |
Max. sample weight | 10 kg | 10 kg | 3 kg | 10 kg | 50 kg | 5 kg | 2 kg |
Dimensions (h x w x d) | 310 mm x 790 mm x 460 mm | 310 mm x 790 mm x 460 mm | 180 mm x 550 mm x 330 mm | 180 mmx 470 mm x 270 mm | 880 mm x 1,050 mm x 1,000 mm | 600 mm x 360 mm x 480 mm | 510 mm x 300 mm x 450 mm |
Autocollimator focal length | 300 | 300 | 150 | 150 | 300 | 300/150 | 150 |
Autocollimator aperture | 45 | 45 | 32 | 32 | 45 | 45/32 | 32 |
Electronic autocollimator | EFL 300 mm, Diameter 57 mm | EFL 300 mm, Diameter 57 mm | EFL 150 mm, Diameter 38 mm | EFL 150 mm, Diameter 38 mm | EFL 300 mm Diameter 57 mm | EFL 300 mm/ 150mm Diameter 57mm/ 38mm | EFL 150 mm, Diameter 38 mm |
Weight | 109 kg | 109 kg | 40 kg | 19 kg | 350 kg | 50 kg | 35 kg |
Type | Table top device | Table top device | Table top device | Table top device | Table top device | Table top device | Table top device |
1) 2.5 arcsec with PrismMaster® Flex 1D
2) 5 arcsec with PrismMaster® Flex 2D
Upgrades & Accessories
The functionality of your PrismMaster® is enhanced with comprehensive upgrades and accessories.

Roof Prism Mount

Small Prism Adapter

Viewfinder

Three Point Support

Reference Sample (trapezoidal)

Measurement Cell
Knowledge Base
More knowledge for experts
Are you interested in the subject of angle measurement? Go to the Knowledge Base of the OptiTest®.