US3638019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting device comprising two optical systems and a radiation sensitive detector
Assignee: US Philips Corp
•
Filing: 1970-04-14
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Granted: 1972-01-25
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Expires: 1990-04-14
Abstract
Abstract A sighting device equipped with two optical systems which each comprise an optical modulator and a lens and the optical axes of which intersect at an acute angle and with a radiation-sensitive detector is described. It is shown that by inserting auxiliary radiation sources between the lenses of the optical systems and the radiation-sensitive detector and by using the lenses as catadioptric systems for imaging the auxiliary radiation sources asymmetrical errors can be eliminated.
Inventors
- 👤 Francois Desvignes
- 👤 Jean Jacques Hunzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/783
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A device for sighting on a remote source of radiation, comprising a first lens, a modulator aligned with the first lens along an optic axis, a second lens, a second optical modulator aligned with the second lens along a second optical axis intersecting the first optical axis, a radiation-sensitive detector in the path of both optic axes, whereby the radiation from the remote source is imaged on the radiation-sensitive detector, and a local source of radiation between the lenses and the radiation detector for projecting radiation in the direction of the lenses, at least one internal surface of each lens having sufficient reflectivity to comprise a catadioptric system for imaging the auxiliary radiation source on the radiation-sensitive detector.
Claim 2
Independent Claim
118 words
A device for sighting on a remote source of radiation, comprising a first lens, a modulator aligned with the first lens along an optic axis, a second lens, a second optical modulator aligned with the second lens along a second optical axis intersecting the first optical axis, a radiation-sensitive detector in the path of both optic axes, whereby the radiation from the remote source is imaged on the radiation-sensitive detector, and a local source of radiation between the lenses and the radiation detector for projecting radiation in the direction of the lenses, at least one internal surface of each lens having sufficient reflectivity to comprise a catadioptric system for imaging the auxiliary radiation source on the radiation-sensitive detector.
Claim 3
Dependent Claim
33 words
A device as claimed in claim 1, wherein an auxiliary radiation source is disposed in each optical axis passing through the optical center of a lens and the center of the radiation-sensitive detector.
Claim 4
Dependent Claim
17 words
A device as claimed in claim 2, wherein the radiation can be separately regulated for each source.
Claim 5
Dependent Claim
41 words
A device as claimed in claim 1, wherein one auxiliary radiation source is provided and that the point of intersection of the axes of the optical systems lies on a line which joins the auxiliary radiation source and the radiation-sensitive detector.
Claim 6
Dependent Claim
26 words
A device as claimed in claim 4, wherein the auxiliary radiation source is surrounded by an apertured screen for limiting the auxiliary radiation to the lenses.
Claim 7
Dependent Claim
12 words
A device as claimed in claim 5, wherein the screen is movable.
Claim 8
Dependent Claim
35 words
A device as claimed in claim 1, wherein the radiation source comprises a small metallic surface through which an electric current flows, the radiation emitted by the or each surface being directed to the lenses.
Claim 9
Dependent Claim
24 words
A device as claimed in claim 1, wherein the surfaces of the lenses turned to the auxiliary radiation sources are coated with antireflection layers.
Claim 10
Dependent Claim
20 words
A device as claimed in claim 8, wherein the lenses are made of a material having a high refractive index.
References Cited (Backward Citations)
US3105905A
Cited
US3162764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |