GB470810A - Improvements in or relating to optical instruments of variable magnification - Google Patents
Improvements in or relating to optical instruments of variable magnificationInfo
- Publication number
- GB470810A GB470810A GB5876/37A GB587637A GB470810A GB 470810 A GB470810 A GB 470810A GB 5876/37 A GB5876/37 A GB 5876/37A GB 587637 A GB587637 A GB 587637A GB 470810 A GB470810 A GB 470810A
- Authority
- GB
- United Kingdom
- Prior art keywords
- eyepiece
- slide
- prism
- objective
- moved
- 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
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
- G02B15/04—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by changing a part
- G02B15/08—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by changing a part by changing the rear part
-
- 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
- G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
- G02B23/18—Housings; Caps; Mountings; Supports, e.g. with counterweight for binocular arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Telescopes (AREA)
Abstract
470,810. Telescopes. SOC. GENERALE D'OPTIQUE SOC. ANON. DES ANCIENS ETABLISSEMENTS HUET & CIE ET JUMELLES FLAMMARION. Feb. 26, 1937, No. 5876. Convention date, April 29, 1936. [Class 97 (i)] In hermetically sealed telescopes, field glasses, or the like, internal means for adjusting the magnification are moved by an external operating member having a movement permitting airtight closure where the member passes through the wall of the instrument. As shown in Fig. 1, a telescope has an objective Ob and two eyepieces O<1>, O<2>. A slide C movable through an aperture in the casing carries two prism systems P<1>, P<2>. In the position shown the prism P<1> reflects light from the objective into the eyepiece O<1>. By pressing the slide C into the casing the prism P<2> is moved to a position where it reflects the light from the objective into the eyepiece O<2>. The aperture may be sealed by a collapsable sleeve M, Fig. 3, secured at one end to the slide C and at the other to the casing K. In a modification one prism system may be fixed in front of one eyepiece and the other prism system or a part only of it'moved by the slide C to intercept the light and pass it to the other eyepiece. In a further modification a single prism system may be rotated from a position in front of one eyepiece to a position in front of the other by a rack and pinion operated by the slide C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR470810X | 1936-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB470810A true GB470810A (en) | 1937-08-23 |
Family
ID=8902541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5876/37A Expired GB470810A (en) | 1936-04-29 | 1937-02-26 | Improvements in or relating to optical instruments of variable magnification |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB470810A (en) |
-
1937
- 1937-02-26 GB GB5876/37A patent/GB470810A/en not_active Expired
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