GB631306A - Improvements in optical sighting devices - Google Patents
Improvements in optical sighting devicesInfo
- Publication number
- GB631306A GB631306A GB2525944A GB2525944A GB631306A GB 631306 A GB631306 A GB 631306A GB 2525944 A GB2525944 A GB 2525944A GB 2525944 A GB2525944 A GB 2525944A GB 631306 A GB631306 A GB 631306A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plane
- marks
- index mark
- eye
- prism
- 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
- G02B23/14—Viewfinders
Abstract
631,306. Optical sighting devices. BARR & STROUD, Ltd., and FRENCH, Sir J. W. Dec. 15, 1944, No. 25259. [Class 97 (i)] The sighting device consists of a single optical element as of glass having a plane object end with an index mark or marks on its surface and an eye end comprising a plane portion through which an object is viewed and a convex portion by which said mark or marks is or are focused so that the object is viewed simultaneously with the index mark or marks. As shown, an index mark 8 on the plane object end 14 of the element is in the focus of a convex portion 7 at the eye end of the element and is viewed simultaneously with an object seen through a plane portion 10, which may be parallel to the plane end 14 to avoid chromatic aberration. In another form, the object end and eye end form two sides of a triangular internallyreflecting prism with the plane portion 10 orthogonal to the object end. The element may also be in the form of a pentagonal doublyreflecting prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2525944A GB631306A (en) | 1944-12-15 | 1944-12-15 | Improvements in optical sighting devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2525944A GB631306A (en) | 1944-12-15 | 1944-12-15 | Improvements in optical sighting devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB631306A true GB631306A (en) | 1949-11-01 |
Family
ID=10224794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2525944A Expired GB631306A (en) | 1944-12-15 | 1944-12-15 | Improvements in optical sighting devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB631306A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3439970A (en) * | 1965-04-05 | 1969-04-22 | Glenn E Rickert | Sighting device |
-
1944
- 1944-12-15 GB GB2525944A patent/GB631306A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3439970A (en) * | 1965-04-05 | 1969-04-22 | Glenn E Rickert | Sighting device |
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