Patent US3871741A successfully refreshed from Google Patents.
US3871741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact optical system permitting instantaneous increase in magnification without refocussing
Assignee: Individual
•
Filing: 1973-04-19
•
Granted: 1975-03-18
•
Expires: 1993-04-19
Abstract
Abstract Optical system comprises mirror mounted to swing between a first position in which light from an objective passes through an image amplifier and stationary reflecting means to an objective and a second position by-passing said amplifier and stationary reflecting means, the difference between the lengths of the light paths resulting from the two positions being such as to compensate for the increase in the distance between the objective and image when the image amplifier is in the light path.
Inventors
- 👤 Serge Clave
- 👤 Marcel Clave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:26
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/02; G02B23/00; G02B23/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
An optical system comprising: an eyepiece, an objective, movable reflecting means pivotally mounted between said eyepiece and objective to swing between a first position and a second position, stationary reflecting means, and stationary image-amplifying means, said movable reflecting means being positioned to reflect light rays from said objective to said eyepiece along a first patch excluding said image-amplifying means and stationary reflecting means, when said reflecting means is in said first position, and to reflect light rays from said objective to said eyepiece along a second path from said objective to said eyepiece including said stationary reflecting means and said imageamplifying means when said movable reflecting means is in said second position, said second optical path being longer than said first optical path by a distance equal to the increase in the distance between said objective and the image formed thereby resulting from the inclusion of said image-amplifying means in said second optical path.
Claim 2
Dependent Claim
154 words
An optical system comprising: an eyepiece, an objective, movable reflecting means pivotally mounted between said eyepiece and objective to swing between a first position and a second position, stationary reflecting means, and stationary image-amplifying means, said movable reflecting means being positioned to reflect light rays from said objective to said eyepiece along a first patch excluding said image-amplifying means and stationary reflecting means, when said reflecting means is in said first position, and to reflect light rays from said objective to said eyepiece along a second path from said objective to said eyepiece including said stationary reflecting means and said imageamplifying means when said movable reflecting means is in said second position, said second optical path being longer than said first optical path by a distance equal to the increase in the distance between said objective and the image formed thereby resulting from the inclusion of said image-amplifying means in said second optical path.
Claim 3
Dependent Claim
157 words
An optical system comprising: an eyepiece, an objective, movable reflecting means pivotally mounted between said eyepiece and objective to swing between a first position and a second position, first stationary reflective means defining with said movable reflecting means a first optical path traversed by light rays passing from said objective to said eyepiece when said movable reflecting means occupies said first position, stationary image-amplifying means, and additional stationary reflecting means, said image-amplifying means and additional stationary reflecting means defining with said movable reflecting means and said first stationary reflecting means a second optical path traversed by light rays passing from said objective to said eyepiece when said movable reflecting means is in said second position, said second optical path being longer than said first optical path by a distance equal to the increase in the distance between said objective and the image formed thereby resulting from the inclusion of said image-amplifying means in said second optical path.
Claim 4
Dependent Claim
157 words
An optical system comprising: an eyepiece, an objective, movable reflecting means pivotally mounted between said eyepiece and objective to swing between a first position and a second position, first stationary reflective means defining with said movable reflecting means a first optical path traversed by light rays passing from said objective to said eyepiece when said movable reflecting means occupies said first position, stationary image-amplifying means, and additional stationary reflecting means, said image-amplifying means and additional stationary reflecting means defining with said movable reflecting means and said first stationary reflecting means a second optical path traversed by light rays passing from said objective to said eyepiece when said movable reflecting means is in said second position, said second optical path being longer than said first optical path by a distance equal to the increase in the distance between said objective and the image formed thereby resulting from the inclusion of said image-amplifying means in said second optical path.
Claim 5
Dependent Claim
43 words
An optical system as claimed in claim 1 in which said movable reflecting means reflects light from said objective to said image amplifying means when in said second position and reflects light from said objective to said eyepiece when in said first position.
Claim 6
Dependent Claim
91 words
An optical system as claimed in claim 1 in which said stationary reflecting means comprises a pair of plane reflecting surfaces positioned at an angle to each other bisected by a plane parallel to the initial path of travel of an axial ray of light from said objective to a first one of said stationary reflective surfaces so that said ray is reflected by said first stationary reflective surface to the other stationary reflective surface and thence backward parallel to the path travelled when it struck said first stationary reflective surface.
Claim 7
Dependent Claim
17 words
Optical system as claimed in claim 1 in which neither optical path crosses itself at any point.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |