Patent US4560252A successfully refreshed from Google Patents.
US4560252A
Expired / Lapsed
US
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Optical filter device
Assignee: Individual
•
Filing: 1984-02-07
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Granted: 1985-12-24
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Expires: 2004-02-07
Abstract
Abstract An optical filter device includes a filter member which is located to intersect an optical path along which optical energy having a high density propagates. The filter member is constantly rotated to sequentially shift a part thereof on which the optical energy is incident. The axis of rotation of the filter member is movable perpendicularly thereto within a predetermined range. The filter member transmits a light component having a particular wavelength and reflects at least one of the light components in the other wavelength range.
Inventors
- 👤 Kei Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:40
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4215; G02B26/00; G02B26/007; G02B26/008; G02B27/00; G02B27/10; G02B27/14; G02B27/145; G02B5/00; G02B5/20; G02B5/208; G02B6/4296; G02B6/4298; G02B6/26; G02B6/28; G02B6/293; G02B6/29346; G02B6/29361; G02B6/29379; G02B6/29395
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
An optical filter device for filtering optical energy having a high energy density which propagates along a predetermined optical path, comprising: a rotatable optical filter located to constantly intersect the optical path at a part thereof, an axis of rotation of the optical filter being movable perpendicularly to said axis of rotation; drive means for rotating said optical filter; whereby the optical energy becomes incident on the part of the optical filter which changes every moment due to rotation of the optical filter.
Claim 2
Dependent Claim
83 words
An optical filter device for filtering optical energy having a high energy density which propagates along a predetermined optical path, comprising: a rotatable optical filter located to constantly intersect the optical path at a part thereof, an axis of rotation of the optical filter being movable perpendicularly to said axis of rotation; drive means for rotating said optical filter; whereby the optical energy becomes incident on the part of the optical filter which changes every moment due to rotation of the optical filter.
Claim 3
Dependent Claim
39 words
An optical filter device as claimed in claim 1, in which the optical filter comprises a disc which is positioned perpendicularly to the optical path to transmit only a component of the optical energy which has a particular wavelength.
Claim 4
Dependent Claim
24 words
An optical filter device as claimed in claim 2, in which the component of the optical energy transmitted through the filter is visible ray.
Claim 5
Dependent Claim
53 words
An optical filter device as claimed in claim 1, in which the optical filter comprises a filter member which is inclined a predetermined angle relative to the optical path to transmit a component of the optical energy having a particular wavelength and reflect at least one of components in the other wavelength range.
Claim 6
Dependent Claim
45 words
An optical filter device as claimed in claim 4, in which said component of the optical energy transmitted through the filter is a visible ray and said at least one of components reflected by the filter is at least one of infrared and ultraviolet rays.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |