OPTICAL ACCESSORIES & COMPONENTS
Reticles
Reticles are a part of collimators, testing telecopes and autocollimators. All reticles have a diameter of 12 mm and a thickness of 1 mm.
The clear aperture of a reticle used at the illuminated side of an autocollimator is 6 mm and at the eyepiece side 10 mm. One Exception are autocollimators with reticle turret. Here is also the illuminated side 10 mm.
The clear aperture of reticles used in collimators or telescopes is always 10 mm.
Click below for additional information on:
Click on buttons below for information on specific reticle types.
RETICLES
General Selection Criteria
General information:
-
The clear aperture of a reticle used at the illuminated side of an autocollimator is 6 mm and at the eyepiece side 10 mm. One exception are autocollimators with reticle turret. Here is also the illuminated side 10 mm.
-
The clear aperture of reticles used in collimators or telescopes is always 10 mm.
Please review the following to aid in correct reticle selection for your specific application:
-
Not all reticles can be used as the eyepiece and collimator reticle. Please note therefore the examples of application for the different reticles or contact us.
-
If the focal length of the objective lens is greater than 300 mm or, for example, a small mirror diameter leads to a strong stop down, reticles with larger line widths are recommended due to the better contrast ratio.
-
If you choose an autocollimator or testing telescope with 90° viewing and reticles with lettering (e.g. coordinate division etc.) please specify the direction of use (A, B, C, D) with your order!
Click on image to enlarge.
RETICLES
Examples for Reticle Combinations
Note: The reticle combinations are valid for autocollimators as well as for combinations of testing telescopes and collimators.
Determination of Wedge Error of Optical Components:
Collimator reticle: Diaphragms (208 740...208 759)
Eyepiece reticles: Crossline (208 111...208 115)
or
Collimator reticle: Crossline (208 111...208 118)
Eyepiece reticles: mm-scale (208 304)
Fast Angle Measurement:
Collimator reticle: Polar coordinate reticle (208 241, 208 860) or mm-scale (208 401)
Eyepiece reticles: Crossline (208 111...208 115)
Adjustment for Sharpness of Optical Systems and Testing for Resolution:
Collimator reticle: Siemens star (208 201, 208 202) or resolution test (208 211...208 217)
Eyepiece reticles: Crossline (208 111...208 115)
Adjustment of an Autocollimator to a Mirror or of a Collimator to a Telescope:
Collimator reticle: Crossline (208 111...208 118)
Eyepiece reticles: Double crossline (208 123, 208 125, 208 127)
Note: The reticle should be chosen, so that in symmetry adjustment a bright gap appears between the double crossline and the single crossline.
Angle Measurement (Determination of Angle Deviations):
Collimator reticle: Crossline (208 111...208 118)
Eyepiece reticles: Angle graduation (arcmin) (208 411...208 431) or line graduation (208 436...208 443)
For use in autocollimators / collimators with reticle turret:
Collimator reticle: Angle graduation (arcmin) (208 411...208 431)
Eyepiece reticles: Crossline (208 111...208 115)
RETICLES
Crosslines
Example of application:
As collimator reticle in conjunction with double crossline reticle for alignment or as eyepiece reticle for adjustment of the diopter setting of eyepieces
RETICLES
Double Crosslines
Example of application:
As eyepiece reticle in conjunction with a crossline reticle for alignment and adjustment
RETICLES
Tolerances
Example of application:
As eyepiece reticle for testing of the parallelism of the axes of stereoscopic viewings and binoculars
Click on any image above to enlarge.
RETICLES
Angle Graduations For Eyepieces
Example of application:
As eyepiece reticle for the measurement of tilting angles of plane mirrors in arcmin
Note: The angle graduation for autocollimators (AK) is designed to directly indicate the tilt angle of the mirror to be measured. If corresponding reticles are used in testing telescopes (F) to determine the angle of view, the result must be multiplied by 2.
Click on any image above to enlarge.
TRG = Total Range of Graduation
RFG = Range of Fine Graduation
SI = Smallest Interval
RETICLES
Angle Graduations For Illumination Sleeves
Example of application:
As collimator reticle for the measurement of tilting angles of plane mirrors in arcmin
Note: The angle graduation for autocollimators (AK) is designed to directly indicate the tilt angle of the mirror to be measured. If corresponding reticles are used in collimators (K) to determine the angle of view, the result must be multiplied by 2.
Click on any image above to enlarge.
TRG = Total Range of Graduation
RFG = Range of Fine Graduation
SI = Smallest Interval
RETICLES
Line Graduations
Example of application:
As reticle for the measurement of tilting angles of plane mirrors in line angle units
Note: The angle graduation for autocollimators (AK) is designed to show directly the tilt angle of the mirror to be measured. In the case of the collimator (K) and testing telescope reticles (F), the angle of view value is displayed directly.
Click on any image above to enlarge.
TRG = Total Range of Graduation
RFG = Range of Fine Graduation
SI = Smallest Interval
RETICLES
Diaphragms/Pinholes
Example of application:
As collimator reticle for the tolerance testing of wedge angles
Click on any image above to enlarge.
RETICLES
Concentric Circles
Example of application:
As eyepiece reticle for simplified measurement of tilting angles of plane mirrors in the unit of arcmin or as distances in the reticle plane.
Click on any image above to enlarge.
RETICLES
Scales (mm-Graduation)
Example of application:
As eyepiece reticle for the measurement of tilting angles of plane mirrors as distances in the reticle plane.
Click on any image above to enlarge.
RETICLES
Resolution Tests
Example of application:
As collimator reticle for testing of the resolution of imaging systems.
Click on any image above to enlarge.
RETICLES
Foucault Tests
Example of application:
As collimator reticle for testing of the resolution of imaging systems.
Art. No. Description Remark
208 221 Focault test 0.0315...0.1, negative
208 222 Focault test 0.016...0.0315, negative
Click on any image above to enlarge.
RETICLES
Siemens Stars
Example of application:
As collimator reticle for adjusting the image sharpness of imaging systems.
Click on any image above to enlarge.
RETICLES
MTF/SFR Test
Example of application:
As collimator reticle for testing of the resolution, infinity setting or contrast of imaging systems.
Art. No. Description Remark
208 901 MTF/SFR Test Chessboard pattern
Note: For MTF tests the crossline reticles (negative) can also be used.
Click on any image above to enlarge.
Reticle Brochure and Spec Sheets
Click on any of the PDF buttons on the right to view, print and download information on reticles.
Reticles Introduction
Line Graduation & Diaphragm Pinholes Reticles
Concentric Circles & Scales mm Graduation Reticles
Cross, Double Cross & Tolerance Reticles
Angle Graduation Reticles
Resolution, Foucault Tests & Siemens Stars Reticles
