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.

MELOS_530_MWO-Slider_1000x500.png

Click on one of the buttons below to go to that section

pdf icon 3_edited_edited.png

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:

  • Effective Focal Length (Positive EFL, Negative EFL)

  • Back Focal Length (BFL)

  • Convex and Concave Radii

  • Wedge Angle and Parallelism 

Click on one of the buttons below to learn more about a specific application.

MELOS Applications Overview MWO Slider 1000x533.png
 
 
MELOS Application focal-length-positive-Principe MWO G4raphic.png

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 1234 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.

MELOS Positive EFL_edited.png
MELOS Application focal-length-positive MWO Graphic 800x533.png

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 234 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.

MELOS Application focal-length-negative MWO Graphic 800x533.png
MELOS Negative EFL_edited.png
MELOS Application focal-length-negative-Principe MWO Graphic.png
 
MELOS Application back-focal-length-Principe MWO Grafic.png

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 1234 can be used.

MELOS Back Focal BFL_edited.png
MELOS Application back-focal-length MWO Graphic 800x533.png
 

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 346 can be used.

MELOS Application convex-radii Principe MWO Graphic.png

Convex Measurement

MELOS Application convex-and-concave-Radii MWO Graphic 800x533.png
MELOS Convex Concave_edited.png
MELOS Application concave-radii Principe MWO Graphic.png

Concave Measurement

 
MELOS Application Wedge-Principe MWO Graphic.png

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 Wedge Ang Parallel_edited.png
MELOS Application wedge-angle-and-parallelism MWO Graphic 800x533.png
 

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.

MELOS_Modules_Overview-MWO_Slider_1000x500_edited.png
pdf icon 3_edited_edited.png

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:

  • One-hand operation for coarse and fine adjustment

  • Adjustment range 530 mm

  • Resolution of the fine adjustment 1 µm

  • Integrated measuring system (Compatible to the display for radius measurement)

  • Resolution 1 µm

  • Accuracy 3 µm

  • Fixture for fast exchage of the measurement modules

  • 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:

  • One-hand operation for coarse and fine adjustment

  • Adjustment range 530 mm

  • Resolution of the fine adjustment 1 µm

  • Integrated measuring system (Compatible to the display for radius measurement)

  • Resolution 1 µm

  • Accuracy 3 µm

  • Fixture for fast exchage of the measurement modules

  • Granite base with threads for tilting table and/or translation stage

  • Integrated collimator K200/40 and especially designed reticle (combination of Siemens star and Porro test pattern)

  • 90°-folding mirror

  • Set of mechanical stops (support for specimen)

Vertically adjustable-Stand-without-measuring-collimator MWO Image 800x533_edited.jpg

Art. No.      Description

235 610      Adjustable Vertical Stand                            (Basic Version)

Vertically adjustable Stand-D40-D65-MWO Image 800x533_edited.jpg

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:

  • Autocollimator with revolving nosepiece

  • Horizontal translation stage with fine adjustment and measuring system:

    • Measurement range: 20 mm

    • Resolution: 1 µm

    • Accuracy: 3 µm
       

Art. No.       Description

235 630    Focus Module

MELOS Focus-Module MWO Image 800x533_edited.jpg

MELOS 530

Focus Module Display Unit

 

  • Large LCD-display with integrated software

  • Easy to use due to menu-based user interface

  • Integrated calculation of focal length, back focal length and radius by direct reading of the length measurement systems

  • Adjustable GO/NO-GO tolerances

  • Storing of measurement results (in table)

  • Data transfer to PC via RS-232 or USB interface

  • Integrated help function

MELOS-Display Unit-MWO Image 800x533_edited.jpg
 

MELOS 530

Live-Image Kit

Video-Mini-PC-MWO Image 800x533n.png

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

MELOS Angle-Modul MWO Image 800x533_edited.jpg

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.

Att Achromats Set.png
MELOS & CIFOS-SET of attachment achromats MWO Image 800x533.png
 
Display Unit radii measurement MWO Image 800x533_edited.jpg

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:

  • measurement range: 530 mm

  • resolution:                1 µm

  • 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:

  • 5° angle tilt in x- and y-axes

  • 1 turn of the adjustment screw corresponds to a tilt angle of 0.25°

Two-axis Tilting table-MWO Image 800x533_edited.jpg

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:

  • 5 mm translation in x- and y-direction

  • 1 turn of the adjustment screw corresponds to a translation of 0.35 mm

Translation station-MWO Image 800x533_edited.jpg

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

Converter MWO Image 800x533_edited.jpg
 

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_Combination-Overview MWO_Slider_1000x500_edited.png
 

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                   -

                   Stand with Collimator          2

                   Focus-Module                       3

MELOS_Combination_1 MWO_Graphic_800x533.png.png

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                  -

              Stand with Collimator             2

              Focus-Module                          3

              Attachment Achromats           6

MELOS_Combination_2 MWO_Graphic_800x533.png.png

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

              Attachment Achromats           6

             Translation Stage                     7

MELOS_Combination_3 MWO_Graphic_800x533.png.png

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

              Attachment Achromats         6

              Translation Stage                  7

              Two Axis Tilting Table            8

MELOS_Combination_4 MWO_Graphic_800x533.png.png

Click on above images to enlarge.

MELOS 530

Configuration 5 (Art. # 235-605) DISCONTINUED

MELOS 530

Configuration 6

 

Measuring configuration for measurement of

 

convex and concave radii

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

              Attachment Achromats          6

              Translation Stage                    7

              Radius Module                        9

              Radius Measurement Unit   10

              Live Image Kit                        11

MELOS_Combination_6 MWO_Graphic_800x533.png.png

Click on above images to enlarge.

MELOS 530

Configuration 7

 

Measuring configuration for measurement of

 

wedge angles & parallelism

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

              Angle Module 2                       5

              Two axis tilting table             8

              Live Image Kit                        11

MELOS_Combination_7 MWO_Graphic_800x533.png.png

Click on above images to enlarge.

MELOS 530

Configuration 8 (Art. # 235-608) DISCONTINUED