GB684292A - Improvements in or relating to optical aligning instruments - Google Patents
Improvements in or relating to optical aligning instrumentsInfo
- Publication number
- GB684292A GB684292A GB4720/51A GB472051A GB684292A GB 684292 A GB684292 A GB 684292A GB 4720/51 A GB4720/51 A GB 4720/51A GB 472051 A GB472051 A GB 472051A GB 684292 A GB684292 A GB 684292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- objective
- image
- images
- plate
- optical axis
- 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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
- G02B23/10—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors reflecting into the field of view additional indications, e.g. from collimator
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
Abstract
684,292. Optical apparatus. KODAK, Ltd. Feb. 27, 1951. [March 7, 1950], No. 4720/51. Class 97 (i). An optical aligning instrument comprises an objective for forming an image of a test object, plane semi-transparent reflecting means in the focal plane of the objective orthogonal to the optical axis of the objective, whereby a second image is formed superimposed on and inverted relative to the first image, and means for viewing the superimposed images. The objective may be a lens or a concave spherical mirror, coincidence of the images indicating alignment of the optical axis with the centre of the object. As shown in Fig. 3,. a triplet objective 43 is mounted in a rim 42 screwing into a lens mount 41 which also carries semireflecting glass plates 48 in screw-threaded rings 49 which are adjusted to pass respectively through the front and rear focal planes of the objective. Two images are thereby formed, one by light which has passed through the objective and both plates and one by light which has passed the first plate and the objective, being reflected back through the objective by the second plate and reflected by the first plate to pass once more through the objective and then through the second plate. These images are observed by a microscope 51 adjustable for focusing. Rotatable wedges 60 permit small adjustments of the direction of the optical axis and sights 50 are provided to assist initial alignment of the instrument. Fig. 5 shows a concave spherical mirror 77 and a Schmidt correcting plate 76, or other correcting system, forming an image 78 of an axial object 75. A semi-transparent reflector 81 in the focal plane of the mirror reflects some of the light, forming this image, as indicated by the beam 82, 83, 84, 85 to form a second image 86 superposed on the image 78 but inverted relative thereto. These images are observed in a microscope 91 via a prism 90. To effect initial alignment of the instrument a low power telescope 88 is provided together with a prism 87, this acting as a viewfinder. Specification 682,369 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US684292XA | 1950-03-07 | 1950-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB684292A true GB684292A (en) | 1952-12-17 |
Family
ID=22082527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4720/51A Expired GB684292A (en) | 1950-03-07 | 1951-02-27 | Improvements in or relating to optical aligning instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB684292A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2586487A1 (en) * | 1985-08-20 | 1987-02-27 | Thomson Csf | SELF-ALIGNMENT DEVICE FOR OPTICAL INFRARED IMAGE OBSERVATION SYSTEM |
| CN113739719A (en) * | 2021-11-08 | 2021-12-03 | 南京英田光学工程股份有限公司 | Surface shape detection system and method of high-precision Schmidt correction plate |
-
1951
- 1951-02-27 GB GB4720/51A patent/GB684292A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2586487A1 (en) * | 1985-08-20 | 1987-02-27 | Thomson Csf | SELF-ALIGNMENT DEVICE FOR OPTICAL INFRARED IMAGE OBSERVATION SYSTEM |
| EP0217692A1 (en) * | 1985-08-20 | 1987-04-08 | Thomson-Csf | Auto-alignment device for an infrared observation system |
| US4707736A (en) * | 1985-08-20 | 1987-11-17 | Thomson Csf | Self alignment device for an optical infrared image observation system |
| CN113739719A (en) * | 2021-11-08 | 2021-12-03 | 南京英田光学工程股份有限公司 | Surface shape detection system and method of high-precision Schmidt correction plate |
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