GB717233A - Improvements in or relating to arrangements for testing optical components and optical systems - Google Patents
Improvements in or relating to arrangements for testing optical components and optical systemsInfo
- Publication number
- GB717233A GB717233A GB655151A GB655151A GB717233A GB 717233 A GB717233 A GB 717233A GB 655151 A GB655151 A GB 655151A GB 655151 A GB655151 A GB 655151A GB 717233 A GB717233 A GB 717233A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- reflector
- beams
- plate
- under test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
717,233. Optical apparatus. SMITH, F. H., and BAKER & HOLBORN, Ltd., C. March, 19, 1952 [March 19, 1951], No. 6551/51. Class 97(1) Apparatus for testing optical reflectors or systems comprises birefringent means for dividing a light beam by double refraction into two coherent beams having wavefronts with mutually different directions of propagation and/or different curvatures the parts of the wavefronts which can subsequently mutually interfere being incident on the reflector or the system at positions spaced, apart or partly overlapping, laterally of their direction or directions of propagation, the reflector, or a reflector associated with the system reflecting the beams back, to the birefringement means so that it refracts them to travel along coincidental paths, and analysing means allowing the two coincident beams to produce viewable interference effects giving an indication of errors in the reflector or system under test. As shown in Fig. 1 a beam 11, polarized by a pack of glass plates 15 is divided into beams 17, 18 by a calcite wedge 16 mounted on a glass plate 19 to give zero deviation to the beam 17. A quartz plate 21 compensates the path difference between the beams 17, 18 which are then incident on the lens 22 under test and are brought to a focus 23 thereby. At the point 23 is located the centre of a hemispherical reflector 25 having a plane reflecting surface 26 with a central aperture. The rays 17 and 18 are reflected back along their paths by the reflector 25, are recombined by the wedge 16 and pass to an analyser 31 and eyepiece 30 in which two coincident images of the lens 22 are seen, crossed by interference fringes according to the imperfections of the lens 22. In a modification the focus 23 may be formed on the upper plane reflecting surface 26, the rays not being reflected back along the same paths. If the lens 22 under test is a microscope objective the cover glass 35 with which it is to be used may be included in the system. The lens 22 may be replaced by a concave reflector to be tested or if the lens 22 is accurate the reflecting system 25 may be replaced by a convex reflector to be tested. In the system shown in Fig. 3 a light beam from a diaphragm 42 is polarized by a polarizer 43, collimated by a lens 44 and divided by a parallel sided calcite plate 46 having its sides oblique to its optic axis. The divided beams 51 and 52 are incident at spaced points on the lens 53 under test and are focused thereby on a plane mirror 54 whence they pass back through another part of the lens and are recombined by the plate 46 to pass through a semi reflecting surface 45 to be viewed through an analyser 31. A quarter wave plate 35 is provided and the spacing of the beams may be varied by tilting the plate 46. This system may be used for testing a plane or prismatic reflector, the lens 53 being absent. As birefringent means two superposed double focus birefringent lenses may be used and may be moved laterally to vary the separation of the beams. Specifications 639,014 and 710,495 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB655151A GB717233A (en) | 1951-03-19 | 1951-03-19 | Improvements in or relating to arrangements for testing optical components and optical systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB655151A GB717233A (en) | 1951-03-19 | 1951-03-19 | Improvements in or relating to arrangements for testing optical components and optical systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB717233A true GB717233A (en) | 1954-10-27 |
Family
ID=9816568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB655151A Expired GB717233A (en) | 1951-03-19 | 1951-03-19 | Improvements in or relating to arrangements for testing optical components and optical systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB717233A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2878722A (en) * | 1955-04-04 | 1959-03-24 | Nat Res Dev | Apparatus and methods for testing optical systems, lenses and the like |
DE1218755B (en) * | 1960-12-13 | 1966-06-08 | Saint Gobain | Device for the continuous detection of optical defects in a moving glass ribbon |
EP0021148A1 (en) * | 1979-06-22 | 1981-01-07 | International Business Machines Corporation | Method and device for interferometric measurement |
US4353650A (en) * | 1980-06-16 | 1982-10-12 | The United States Of America As Represented By The United States Department Of Energy | Laser heterodyne surface profiler |
WO1991003702A1 (en) * | 1989-09-08 | 1991-03-21 | Michael John Downs | Optical measuring instruments |
WO2003004966A1 (en) | 2001-07-06 | 2003-01-16 | Zygo Corporation | Interferometry system and method employing an angular difference in propagation between orthogonally polarized input beam components |
CN106895963A (en) * | 2017-04-09 | 2017-06-27 | 南京东利来光电实业有限责任公司 | Large-numerical aperture immersion oil lens detecting device and method |
CN116092358A (en) * | 2022-09-09 | 2023-05-09 | 长江大学文理学院 | Optical principle experimental device |
CN116092358B (en) * | 2022-09-09 | 2024-05-24 | 长江大学文理学院 | Optical principle experimental device |
-
1951
- 1951-03-19 GB GB655151A patent/GB717233A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2878722A (en) * | 1955-04-04 | 1959-03-24 | Nat Res Dev | Apparatus and methods for testing optical systems, lenses and the like |
DE1218755B (en) * | 1960-12-13 | 1966-06-08 | Saint Gobain | Device for the continuous detection of optical defects in a moving glass ribbon |
EP0021148A1 (en) * | 1979-06-22 | 1981-01-07 | International Business Machines Corporation | Method and device for interferometric measurement |
US4353650A (en) * | 1980-06-16 | 1982-10-12 | The United States Of America As Represented By The United States Department Of Energy | Laser heterodyne surface profiler |
WO1991003702A1 (en) * | 1989-09-08 | 1991-03-21 | Michael John Downs | Optical measuring instruments |
US5847828A (en) * | 1989-09-08 | 1998-12-08 | Btg International Limited | Michelson interferometer using matched wedge-shaped beam splitter and compensator |
WO2003004966A1 (en) | 2001-07-06 | 2003-01-16 | Zygo Corporation | Interferometry system and method employing an angular difference in propagation between orthogonally polarized input beam components |
EP1412694A1 (en) * | 2001-07-06 | 2004-04-28 | Zygo Corporation | Interferometry system and method employing an angular difference in propagation between orthogonally polarized input beam components |
EP1412694A4 (en) * | 2001-07-06 | 2010-07-28 | Zygo Corp | Interferometry system and method employing an angular difference in propagation between orthogonally polarized input beam components |
CN106895963A (en) * | 2017-04-09 | 2017-06-27 | 南京东利来光电实业有限责任公司 | Large-numerical aperture immersion oil lens detecting device and method |
CN106895963B (en) * | 2017-04-09 | 2024-01-26 | 南京东利来光电实业有限责任公司 | Device and method for detecting large numerical aperture immersion oil lens |
CN116092358A (en) * | 2022-09-09 | 2023-05-09 | 长江大学文理学院 | Optical principle experimental device |
CN116092358B (en) * | 2022-09-09 | 2024-05-24 | 长江大学文理学院 | Optical principle experimental device |
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