Optical Testing Instruments
If you know the specific type of Optical Testing Instruments you would like more information on, click on one of the buttons just below in the header. If you would like general information about the different types of Optical Testing Instruments available, then scroll down this page for the topic sections about the instruments.
Measuring Equipment for Lenses & Optical Systems
Secondary Image Angle Measuring Instrument
PRODUCTS
Optical Testing Instruments
The Measuring Equipment for Lenses and Optical Systems (MELOS) is designed to be a multi-purpose, vertical lens bench for making measurements of effective focal length, wedge, radius of curvature and centering.
A line of special telescopes specifically designed for measuring, testing and calibration applications in optical laboratories and optics production of eyepieces and lenses found in telescopes, binoculars, cameras and similar optical products.
The Camera Testing Instrument III can be used both for testing the adaptation of lenses directly to the camera and for the similar testing of the flange focal length of interchangeable lenses as well as issues with the zoom function.
The Secondary Image Angle Measuring Instrument (SIAM) is a measuring device for the determination of angles between primary and secondary images for windshields. Very helpful working with HUDs.
OPTICAL TESTING EQUIPMENT
MELOS 530 - Measurement Equipment for Lenses and Optical Systems
The Measuring Equipment for Lenses and Optical Systems (MELOS) is designed to be a multi-purpose, vertical lens bench for making measurements of effective focal length, wedge, radius of curvature and centering.
The MELOS 530 is used for focal length, back focal length, radii and wedge angles which can be tested quickly and easily. Improvement to the mechanics and optics of the instrument make it possible to measure radius and back focal length from ±5 mm to ±530 mm. The measuring range can be decreased or increased on special request.
Click on one of the buttons below to go to that section
Click on PDF icon to view, print or download the MELOS brochure.
MELOS 530
Typical Applications
The MELOS 530 (Measuring Equipment for Lenses and Optical Systems) can be used for the following applications:
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Effective Focal Length (Positive EFL, Negative EFL)
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Back Focal Length (BFL)
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Convex and Concave Radii
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Wedge Angle and Parallelism
Click on one of the buttons below to learn more about a specific application.
TYPICAL APPLICATIONS
Measurement of Positive EFL
The measuring collimator projects a reticle image to infinity. The specimen produces image of the reticle in its focal plane. The size of the reticle image is determined solely by the known focal length of collimator objective and the focal length of the specimen, which is to be measured. The measurement of the size of the projected reticle with a reading telescope consisting of an autocollimator and an attachment achromat gives the focal length. The measurement process is done menu-controlled by the display unit.
For measurement of positive focal lengths the combinations 1, 2, 3, 4 can be used.
Note: The Converter extends the measuring range of the effective focal lengths measurement down to ±1 mm. For these focal length a measurement accuracy of 0.3% is achieved.
TYPICAL APPLICATIONS
Measurement of Negative EFL
The measuring collimator projects a reticle image to infinity. The specimen produces virtual image of the reticle in its focal plane. The measurement of the size of the virtual reticle image with a reading telescope consisting of an autocollimator and an attachment achromat gives the focal length. The measurement process is done menu-controlled by the display unit.
For measurement of negative focal lengths the combinations 2, 3, 4 can be used.
Note: The Converter extends the measuring range of the effective focal lengths measurement down to ±1 mm. For these focal length a measurement accuracy of 0.3% is achieved.
TYPICAL APPLICATIONS
Measurement of Back Focal Length (BFL)
The measuring collimator projects a reticle image to infinity. The specimen produces this image in its focal plane. The reading telescope consists of an autocollimator and a microscope objective. By vertical shifting of the reading telescope the distance of the reticle image to the specimen surface is determined. The measurement process is done menu-controlled by the display unit.
For measurement of back focal length the combinations 1, 2, 3, 4 can be used.
TYPICAL APPLICATIONS
Measurement of Convex and Concave Radii
An autocollimator with attachment achromat is used. The autocollimator produces a reticle image in the focal plane of the attachment achromat. This configuration produces autocollimation images in the vertex and center of curvature of the surface of the specimen. The vertical distance R is the radius, which is to be measured. The measurement process is done menu-controlled by the display unit.
For measurement of convex and concave radii the combinations 3, 4, 6 can be used.
Convex Measurement
Concave Measurement
TYPICAL APPLICATIONS
Testing of Wedge Angles & Parallelism
An autocollimator with a reticle turret is used. The autocollimator is equipped with a set of six pinholes. Each pinhole represents a certain wedge angle. The parallel beam from the autocollimator is reflected at both surfaces of the specimen. Each reflection produces an autocollimation image. If both pinhole images coincide (a) the surfaces are parallel. Otherwise a double image occurs. The wedge angle can be inside (b) or outside (c) the tolerance limit defined by the pinhole.
For testing of wedge angle and parallelism the combinations 4 und 7 can be used.
MELOS 530
MELOS 530 Components
All components available for the MELOS 530 (Measuring Equipment for Lenses and Optical Systems) are described below.
Please click on any of the component buttons here to learn more about them and to help configure a system that would be most suited to your applications.
Click on PDF icon to view, print or download the MELOS brochure.
MELOS 530
Adjustable Vertical Stand
MÖLLER-WEDEL OPTICAL offers a basic adjustable vertical stand with excellent straightness and high stability as base module for the MELOS 530.
Features:
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One-hand operation for coarse and fine adjustment
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Adjustment range 530 mm
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Resolution of the fine adjustment 1 µm
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Integrated measuring system (Compatible to the display for radius measurement)
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Resolution 1 µm
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Accuracy 3 µm
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Fixture for fast exchage of the measurement modules
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Granite base with threads for tilting table and/or translation stage
MELOS 530
Adjustable Vertical Stand with Measuring Collimator
MÖLLER-WEDEL OPTICAL offers an adjustable vertical stand with in base integrated Collimator K200/40 with excellent straightness and high stability as module for the MELOS 530.
Features:
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One-hand operation for coarse and fine adjustment
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Adjustment range 530 mm
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Resolution of the fine adjustment 1 µm
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Integrated measuring system (Compatible to the display for radius measurement)
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Resolution 1 µm
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Accuracy 3 µm
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Fixture for fast exchage of the measurement modules
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Granite base with threads for tilting table and/or translation stage
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Integrated collimator K200/40 and especially designed reticle (combination of Siemens star and Porro test pattern)
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90°-folding mirror
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Set of mechanical stops (support for specimen)
Art. No. Description
235 610 Adjustable Vertical Stand (Basic Version)
Art. No. Description
235 620 Adjustable Vertical Stand
with measuring collimator
MELOS 530
Focus Module
The Focus Module consists of measuring head, display unit and TV - Set:
Features:
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Autocollimator with revolving nosepiece
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Horizontal translation stage with fine adjustment and measuring system:
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Measurement range: 20 mm
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Resolution: 1 µm
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Accuracy: 3 µm
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Art. No. Description
235 630 Focus Module
MELOS 530
Focus Module Display Unit
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Large LCD-display with integrated software
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Easy to use due to menu-based user interface
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Integrated calculation of focal length, back focal length and radius by direct reading of the length measurement systems
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Adjustable GO/NO-GO tolerances
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Storing of measurement results (in table)
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Data transfer to PC via RS-232 or USB interface
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Integrated help function
MELOS 530
Live-Image Kit
The Live-Image-Kit is included in scope of delivery of the Focus-Module!
The Live-Image-Kit is based on a full-fledged mini-PC (Windows® 10) in combination with 19" monitor. This mini-PC can also be ordered separately as a space-saving solution for running software as e.g. ELCOdirect and INTOMATIK-S in combination with the corresponding measurement system of the MÖLLER-WEDEL OPTICAL GmbH.
Note: It is also possible to order the C-Mount-Adapter separately, to connect your own camera type with our visual optical instruments (e.g. telescopes, autocollimators and alignment systems). We recommend ordering the corresponding eyepiece hull for the C-Mount Adapter. This replaces the diopter setting of classic eyepiece hull with the possibility to lock the focus position of the C-Mount adapter.
Art. No. Description Comment
229 931 Live-Image-Kit
229 933 Video-Mini-PC (Windows® 10) Can be ordered separately
133 401 07C-Mount Adapter Can be ordered separately, should be combined with eyepiece hull.
280 385 Eyepiece Hull Can be ordered with a C-Mount adapter
773 000 33USB C-MOS Camera Monochrome camera with 1:1.8"
229 934 Software LiveVIEWER Lite Can be ordered separately; only usable in combination with IDS camera.
MELOS 530
Radius & Angle Modules
Art. No. Description Comment
235 640 Radius-Module consists of autocollimator AKG 200/40/14.7 and holder
235 645 Angle-Module 1 consists of autocollimator AKR 140/40/14.7 SWL and holder
235 647 Angle-Module 2 consists of autocollimator AKR 300/40/14.7 SWL and holder
Click on the autocollimator links above to learn more about these components.
MELOS 530
Set of Attachment Achromats
This typical set is useful for e.g. determining negative effective focal lengths and convex or concave radii in combination with a MELOS 530.
MELOS 530
Display for Radius Measurement Unit
MÖLLER-WEDEL OPTICAL offers a display for radius measurement in combination with adjustable vertical stand for MELOS 530 or the Interferometer VI direct series for vertical set-ups.
The display allows direct reading of radius out of the vertical position.
The therefore needed stands have a integrated measurement system with:
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measurement range: 530 mm
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resolution: 1 µm
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accuracy: 3 µm
Art. No. Description Comment
773 170 05 Radius Display Module Separate order only as spare part and on request.
Note: For heavy or large specimen the horizontal set-up is recommended. The module is only offered with the associated adjustable vertical stands!
MELOS 530
Two Axes Tilting Table
The two-axes tilting table is compatible to the vertical and adjustable vertical stands.
Features:
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5° angle tilt in x- and y-axes
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1 turn of the adjustment screw corresponds to a tilt angle of 0.25°
Art. No. Description
235 670 Two-Axes Tilting Table
MELOS 530
Translation Stage
The translation stage (XY-table) is compatible to the vertical and adjustable vertical stands.
Features:
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5 mm translation in x- and y-direction
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1 turn of the adjustment screw corresponds to a translation of 0.35 mm
Art. No. Description
235 680 Translation Stage
MELOS 530
Converter
The converter extends the measuring range of the effective focal lengths measurement of MELOS 530 down to ±1 mm. For these focal length a measurement accuracy of 0.3% is achieved.
Simple Usage:
The converter is inserted in beam exit hole in the base plate of the MELOS 530 and can be instantly put to use.
Art. No. Description
235 665 Converter
MELOS 530
Component Configurations
MÖLLER-WEDEL OPTICAL GmbH offers six different configurations of MELOS components for fast switching between different measurement tasks or the perfect fitting instrument for your application.
MELOS 530
Configuration 1
Measuring configuration for measurement of:
- positive effective focal lengths
- back focal lengths
Consisting of 2 components as seen in the graphic on the right.
Art. No. Description Drawing Ref.
235 601 Configuration 1 -
Click on above images to enlarge.
MELOS 530
Configuration 2
Measuring configuration for measurement of
- positive effective focal lengths
- negative effective focal lengths
- back focal lengths
Consisting of 3 components as seen in the graphic on the right.
Art. No. Description Drawing Ref.
235 602 Configuration 2 -
Click on above images to enlarge.
MELOS 530
Configuration 3
Measuring configuration for measurement of
- positive effective focal lengths
- negative effective focal lengths
- back focal lengths
- convex and concave radii
Consisting of 4 components as seen in the graphic on the right.
Art. No. Description Drawing Ref.
235 603 Configuration 3 -
Stand with Collimator 2 Focus-Module 3
Translation Stage 7
Click on above images to enlarge.
MELOS 530
Configuration 4
Measuring configuration for measurement of
- positive effective focal lengths
- negative effective focal lengths
- back focal lengths
- convex and concave radii
- wedges & angles
Consisting of 7 components as seen in the graphic on the right.
Art. No. Description Drawing Ref.
235 604 Configuration 4 -
Stand with Collimator 2 Focus-Module 3
Angle Module 1 4
Angle Module 2 5
Translation Stage 7
Two Axis Tilting Table 8
Click on above images to enlarge.
MELOS 530
Configuration 5 (Art. # 235-605) DISCONTINUED
MELOS 530
Configuration 6
Measuring configuration for measurement of
Consisting of 6 components as seen in the graphic on the right.
Art. No. Description Drawing Ref.
235 606 Configuration 6 -
Stand with Collimator 1 Focus-Module 3
Translation Stage 7
Radius Module 9
Radius Measurement Unit 10
Live Image Kit 11
Click on above images to enlarge.
MELOS 530
Configuration 7
Measuring configuration for measurement of
Consisting of 5 components as seen in the graphic on the right.
Art. No. Description Drawing Ref.
235 607 Configuration 7 -
Stand with Collimator 1 Angle Module 1 4
Two axis tilting table 8
Live Image Kit 11
Click on above images to enlarge.
MELOS 530
