Measurements with collimator and industrial telescope<\/h1><\/div>While collimators project a structure engraved on a reticle to a certain finite or infinite distance, industrial telescopes are used for the visual inspection of objects at a fixed distance. TRIOPTICS offers both optical instruments within the OptiTest\u00ae<\/sup><\/a> product group. Numerous options such as different reticles, wavelengths and focusing are available. The combination of a collimator with an industrial telescope is used for the application of angle measurements, image quality testing or measurement of optical parameters.<\/p>\n<\/div><\/div><\/div><\/div><\/div>Angle measurement<\/h2><\/div><\/div><\/div><\/div><\/div>Angle measurement<\/h3><\/div>A telescope mounted in the front of a collimator enables the simultaneous observation of both collimator and telescope reticle. When a collimator is perfectly aligned to a telescope the reticles are superimposed and no displacement occurs.<\/p>\n
The presence of an angle \u03b1 between the collimator and telescope axes is shown by a linear displacement d between the two reticles. The displacement d gives the size of the angular disalignment (in radians) of the two instruments:<\/p>\n
\u03b1 = d\/f<\/strong><\/p>\n<\/div>![\"Angle](\"https:\/\/trioptics.com\/us\/wp-content\/uploads\/sites\/4\/2022\/12\/angle_measurement_with_Collimators_and_Telescopes.jpg\" "\\"Angle")
<\/span><\/div>where:<\/p>\n
d=linear displacement measured in the reticle plane (focal plane)<\/p>\n
f=effective focal length (EFL) of the observing instrument (i.e. telescope)<\/p>\n
To ease the angular alignment of equipment with flat surfaces a special type of instruments can be used: the square body collimators and telescopes<\/strong>. The reticles of these instruments are accurately aligned to the outer square body surfaces.<\/p>\n<\/div><\/i><\/i><\/span>Read more<\/span><\/a><\/h4><\/div>Since collimators and telescopes used for angle measurement have a standard infinity setting and therefore the beams of the instruments are parallel, the measurement is not affected:<\/p>\n\n- when a parallel displacement of the optical axes occurs<\/li>\n
- when the distance between the instrument is modified<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
Measurement of the transmission angle through prisms<\/h3><\/div>![\"Measurement](\"https:\/\/trioptics.com\/us\/wp-content\/uploads\/sites\/4\/2022\/12\/Messung-des-Transmissionswinkels-durch-Prismen.jpg\" "\\"Angle")
<\/span><\/div>Absolute measurement: The telescope is attached to a precision rotary table with read out:<\/p>\n
First reading: collimator and telescope aligned (without sample)<\/p>\n
Second reading: sample positioned, telescope rotated until the reticles are super imposed. Reading on rotary table.<\/p>\n
Relative measurement: a master prism is used, collimator and telescope rotated until reticles are super imposed and fixed in this position. The sample is placed instead of master prism. Reading on telescope.<\/p>\n<\/div>
<\/i><\/i><\/span>Recommended configuration:<\/span><\/a><\/h4><\/div>\n\n- TRIOPTICS Autocollimators<\/a><\/li>\n
- Eyepiece reticles: angle graduated scales<\/li>\n
- Collimator reticles: single cross line: RET-02 (RET-01, RET-12, RET-04)<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
Alignment of prism systems<\/h3><\/div>![\"Alignment](\"https:\/\/trioptics.com\/us\/wp-content\/uploads\/sites\/4\/2022\/12\/Ausrichten-von-Prismensystemen.jpg\" "\\"Angle")
<\/span><\/div>The collimator and the telescope are strictly aligned. When the binoculars or the prism system only are placed between the collimator and telescope tilt and rotation of prisms can be measured.<\/p>\n<\/div>
<\/i><\/i><\/span>Recommended configuration:<\/span><\/a><\/h4><\/div>Option 1:<\/u><\/p>\n\n- Option TRIOPTICS OptiAngle<\/li>\n
- Eyepiece reticles: double cross line<\/li>\n
- Collimator reticles: single cross line<\/li>\n<\/ul>\n
Preferred combinations:<\/p>\n
\n- RET-24\/RET-02<\/li>\n
- RET-24\/RET-12<\/li>\n
- RET-24\/RET-13<\/li>\n
- RET-02\/RET-12<\/li>\n
- RET-22\/RET-01(f <300 mm)<\/li>\n<\/ul>\n
Option 2:<\/u><\/p>\n\n- TRIOPTICS OptiAngle<\/li>\n
- Eyepiece reticle: mm scales<\/li>\n
- Collimator reticle: Porro plates, slits patterns, etc.<\/li>\n<\/ul>\n
Preferred combinations<\/p>\n
\n- RET-71\/RET-13(RET-02)<\/li>\n
- RET-91\/RET-13 (RET-02, RET-86)<\/li>\n
- RET-02\/RET-73<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>Questions on angle measurement?<\/span><\/a><\/div><\/div><\/div><\/div><\/div>
Measurement of optical parameters<\/h2><\/div><\/div><\/div>Measurement of focal length<\/h3><\/div><\/div>![\"Measurement](\"https:\/\/trioptics.com\/us\/wp-content\/uploads\/sites\/4\/2022\/12\/Messung-der-Brennweite.jpg\" "\\"Messung")
<\/span><\/div>A typical application is the measurement of the effective focal length EFL. A highly corrected collimator set to infinity (emerging beam is parallel) has a reticle with a pair of spaced lines located in its focal plane. The image of the reticle is projected over the lens under test and focused in its focal plane. By means of a microscope (or a telescope with a supplementary achromat) the size of spaced lines is determined and the EFL calculated: f = fcol x S’\/S<\/strong><\/p>\n<\/div><\/i><\/i><\/span>Recommended configuration:<\/span><\/a><\/h4><\/div>\n\n- TRIOPTICS OptiAngle<\/li>\n
- Eyepiece reticle: mm scales<\/li>\n
- Collimator reticle: Porro plates, slits patterns, etc.<\/li>\n<\/ul>\n
Preferred combinations<\/p>\n
\n- RET-71\/RET-13(RET-02)<\/li>\n
- RET-91\/RET-13 (RET-02, RET-86)<\/li>\n
- RET-02\/RET-73<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
Measurement of centration errors<\/h3><\/div><\/div>![\"Measurement](\"https:\/\/trioptics.com\/us\/wp-content\/uploads\/sites\/4\/2022\/12\/Messung-des-Zentrierfehlers.jpg\" "\\"Measurement")
<\/span><\/div>A collimator set to infinity contains a reticle with a dark or bright cross. The lens under test is placed in a precision rotary holder. The image of a reticle projected over the lens under test is observed by means of a telescope with additional achromat having a graduated reticle.<\/p>\n
While rotating the holder with the lens, the circle described by the reticle image is measured.<\/p>\n<\/div>
While collimators project a structure engraved on a reticle to a certain finite or infinite distance, industrial telescopes are used for the visual inspection of objects at a fixed distance. TRIOPTICS offers both optical instruments within the OptiTest\u00ae<\/sup><\/a> product group. Numerous options such as different reticles, wavelengths and focusing are available. The combination of a collimator with an industrial telescope is used for the application of angle measurements, image quality testing or measurement of optical parameters.<\/p>\n<\/div><\/div><\/div><\/div><\/div> A telescope mounted in the front of a collimator enables the simultaneous observation of both collimator and telescope reticle. When a collimator is perfectly aligned to a telescope the reticles are superimposed and no displacement occurs.<\/p>\n The presence of an angle \u03b1 between the collimator and telescope axes is shown by a linear displacement d between the two reticles. The displacement d gives the size of the angular disalignment (in radians) of the two instruments:<\/p>\n \u03b1 = d\/f<\/strong><\/p>\n<\/div> where:<\/p>\n d=linear displacement measured in the reticle plane (focal plane)<\/p>\n f=effective focal length (EFL) of the observing instrument (i.e. telescope)<\/p>\n To ease the angular alignment of equipment with flat surfaces a special type of instruments can be used: the square body collimators and telescopes<\/strong>. The reticles of these instruments are accurately aligned to the outer square body surfaces.<\/p>\n<\/div> Absolute measurement: The telescope is attached to a precision rotary table with read out:<\/p>\n First reading: collimator and telescope aligned (without sample)<\/p>\n Second reading: sample positioned, telescope rotated until the reticles are super imposed. Reading on rotary table.<\/p>\n Relative measurement: a master prism is used, collimator and telescope rotated until reticles are super imposed and fixed in this position. The sample is placed instead of master prism. Reading on telescope.<\/p>\n<\/div> The collimator and the telescope are strictly aligned. When the binoculars or the prism system only are placed between the collimator and telescope tilt and rotation of prisms can be measured.<\/p>\n<\/div> Preferred combinations:<\/p>\n Option 2:<\/u><\/p>\n Preferred combinations<\/p>\n A typical application is the measurement of the effective focal length EFL. A highly corrected collimator set to infinity (emerging beam is parallel) has a reticle with a pair of spaced lines located in its focal plane. The image of the reticle is projected over the lens under test and focused in its focal plane. By means of a microscope (or a telescope with a supplementary achromat) the size of spaced lines is determined and the EFL calculated: f = fcol x S’\/S<\/strong><\/p>\n<\/div> Preferred combinations<\/p>\n A collimator set to infinity contains a reticle with a dark or bright cross. The lens under test is placed in a precision rotary holder. The image of a reticle projected over the lens under test is observed by means of a telescope with additional achromat having a graduated reticle.<\/p>\n While rotating the holder with the lens, the circle described by the reticle image is measured.<\/p>\n<\/div>Angle measurement<\/h2><\/div><\/div><\/div><\/div><\/div>
Angle measurement<\/h3><\/div>
<\/span><\/div><\/i><\/i><\/span>Read more<\/span><\/a><\/h4><\/div>
\n
Measurement of the transmission angle through prisms<\/h3><\/div>
<\/span><\/div><\/i><\/i><\/span>Recommended configuration:<\/span><\/a><\/h4><\/div>
\n
Alignment of prism systems<\/h3><\/div>
<\/span><\/div><\/i><\/i><\/span>Recommended configuration:<\/span><\/a><\/h4><\/div>
\n
\n
\n
\n
Measurement of optical parameters<\/h2><\/div><\/div><\/div>
Measurement of focal length<\/h3><\/div>
<\/span><\/div><\/i><\/i><\/span>Recommended configuration:<\/span><\/a><\/h4><\/div>
\n
\n
Measurement of centration errors<\/h3><\/div>
<\/span><\/div>
![\"Measurement](\"https:\/\/trioptics.com\/us\/wp-content\/uploads\/sites\/4\/2022\/12\/Messung-der-Fokussierungsabstande.jpg\" "\\"Measurement")
<\/span><\/div>