GB483491A - Improvements in portable telescopes or the like - Google Patents
Improvements in portable telescopes or the likeInfo
- Publication number
- GB483491A GB483491A GB2853136A GB2853136A GB483491A GB 483491 A GB483491 A GB 483491A GB 2853136 A GB2853136 A GB 2853136A GB 2853136 A GB2853136 A GB 2853136A GB 483491 A GB483491 A GB 483491A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mouldings
- recesses
- cavities
- telescopes
- baker
- 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
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Prostheses (AREA)
Abstract
483,491. Telescopes. BAKER, F. \V. W., BAKER, W. E. W., and REYERSBACH, C. D. Oct. 20, 1936, No. 28531. [Class 97 (i)] In telescopes, particularly binoculars, in which the rays undergo a number of reflections between the objective and the eyepiece, the reflecting-means comprises two mouldings each formed with a prism-shaped recess, the mouldings being fastened together with the recesses at right-angles to each other so that reflection occurs at the inclined faces of the recesses. As shown, the mouldings 10, 11 are made from transparent synthetic resin and are provided with cavities 12, 14 each having the shape of the ordinary triangular prism used in prismatic binoculars. The mouldings are placed together so that the two recesses are at right-angles to each other and are united by heat and pressure. Cylindrical cavities 13, 15 are preferably formed in the mouldings to reduce the absorption of light. The path of the rays is shown by the arrows. The cavities 13, 15 may extend right through the material, the external orifices then being closed by glass &c. discs sealed in position. In this case the mouldings may be made of opaque material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2853136A GB483491A (en) | 1936-10-20 | 1936-10-20 | Improvements in portable telescopes or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2853136A GB483491A (en) | 1936-10-20 | 1936-10-20 | Improvements in portable telescopes or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB483491A true GB483491A (en) | 1938-04-20 |
Family
ID=10277100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2853136A Expired GB483491A (en) | 1936-10-20 | 1936-10-20 | Improvements in portable telescopes or the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB483491A (en) |
-
1936
- 1936-10-20 GB GB2853136A patent/GB483491A/en not_active Expired
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