GB786534A - Improvements relating to rangefinders, and like optical instruments - Google Patents
Improvements relating to rangefinders, and like optical instrumentsInfo
- Publication number
- GB786534A GB786534A GB1891355A GB1891355A GB786534A GB 786534 A GB786534 A GB 786534A GB 1891355 A GB1891355 A GB 1891355A GB 1891355 A GB1891355 A GB 1891355A GB 786534 A GB786534 A GB 786534A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- sun
- instrument
- slot
- beams
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Burglar Alarm Systems (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
786,534. Rangefinders. BARR & STROUD, Ltd. May 24, 1956 [June 30, 1955], No. 18913/55. Class 97(1) A coincidence or stereoscopic rangefinder of the self-contained base type utilizing two incoming light beams has in each of the beams a substantially opaque screen having a narrow parallel-sided slot thereon so that when the rangefinder is directed'at the sun to check the infinity adjustment passage of excessive heat to the instrument is prevented and the image of the sun is elongated by diffraction at the edges of the slot. As shown diagrammatically in Fig. 1 the screens 2 are arranged in the incoming beams 4 so that the slots line in the plane of triangulation of the instrument, the slot being so narrow as to produce by diffraction an elongation of the image of the sun as shown at 38 in Fig. 7A which facilitates! testing of the infinity adjustment and minimizes errors in such testing arising from halving errors in the instrument. The screens may be fixed to the windows 3 or pivoted on the outside of the casing to be moved over or away from the windows or pivotally mounted within the casing. The slit may be of variable width being formed of a fixed plate 29 and a plate 30 pressed away from the plate 29 by a spring 31 engaging a fixed rivet 32 but moved towards the plate 29 by a ring 33 rotatable about the axis of the screen and having a cam surface 34 engaging projections 35 on the plate 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1891355A GB786534A (en) | 1955-06-30 | 1955-06-30 | Improvements relating to rangefinders, and like optical instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1891355A GB786534A (en) | 1955-06-30 | 1955-06-30 | Improvements relating to rangefinders, and like optical instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB786534A true GB786534A (en) | 1957-11-20 |
Family
ID=10120579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1891355A Expired GB786534A (en) | 1955-06-30 | 1955-06-30 | Improvements relating to rangefinders, and like optical instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB786534A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8284988B2 (en) | 2009-05-13 | 2012-10-09 | Applied Vision Corporation | System and method for dimensioning objects using stereoscopic imaging |
| US8508591B2 (en) | 2010-02-05 | 2013-08-13 | Applied Vision Corporation | System and method for estimating the height of an object using tomosynthesis-like techniques |
| US8781159B2 (en) | 2009-05-13 | 2014-07-15 | Applied Vision Corporation | System and method for dimensioning objects using stereoscopic imaging |
-
1955
- 1955-06-30 GB GB1891355A patent/GB786534A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8284988B2 (en) | 2009-05-13 | 2012-10-09 | Applied Vision Corporation | System and method for dimensioning objects using stereoscopic imaging |
| US8781159B2 (en) | 2009-05-13 | 2014-07-15 | Applied Vision Corporation | System and method for dimensioning objects using stereoscopic imaging |
| US8508591B2 (en) | 2010-02-05 | 2013-08-13 | Applied Vision Corporation | System and method for estimating the height of an object using tomosynthesis-like techniques |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES332351A1 (en) | Camera cinematographica estereoscopica. (Machine-translation by Google Translate, not legally binding) | |
| US3001081A (en) | Photoelectric gage | |
| GB786534A (en) | Improvements relating to rangefinders, and like optical instruments | |
| GB1029929A (en) | Optical apparatus for determining correlation or convolution functions | |
| GB859208A (en) | Improvements in autocollimation spectroscopes | |
| GB955763A (en) | Device for the determination of the relative positions of two members | |
| GB1502158A (en) | Lens meter | |
| GB1411439A (en) | Optical velocity measuring apparatus | |
| US2507229A (en) | Range finder | |
| GB1118022A (en) | Improvements in or relating to periscopes | |
| GB910410A (en) | Photoelectric exposure meter and reflex viewfinder for use with a photographic camera | |
| GB1245481A (en) | Cinematographic camera with a built-in exposure meter | |
| GB626642A (en) | Improvements in or relating to light beam indicating apparatus | |
| GB1152973A (en) | Axially Measuring Ophthalmometer | |
| GB1286421A (en) | Optical device for testing alignment and direction | |
| SU531023A1 (en) | Method of controlling lens centering in cartridge | |
| GB1167240A (en) | Apparatus for Determining the Position of the Focal Plane of a Camera Lens | |
| GB821466A (en) | Optical navigational device | |
| SU90690A2 (en) | Device for projecting stereoscopic film on a raster screen | |
| GB765394A (en) | Stereoscopic camera with range finder | |
| GB760881A (en) | A reading device for scales and the like | |
| GB965410A (en) | Improvements in photoelectric devices for locating division lines and similar marks | |
| GB1483950A (en) | Apparatus for measuring the speed of light by the foucault method | |
| GB602212A (en) | Improvements in and relating to predictor sights | |
| GB714340A (en) | Interference- or combined interference-schlieren apparatus with unusually large measuring field |