US4171877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for recording images of crystalline lens sections
Assignee: Topcon Corp
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Filing: 1978-02-14
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Granted: 1979-10-23
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Expires: 1998-02-14
Abstract
Abstract An apparatus is provided comprising a slit illumination system for projecting a slit illumination light along a slit axis, and a recording optical system including a taking lens and an image plane, said taking lens having an optical axis intersecting at an angle with a plane containing said slit illumination light, said taking lens further having a major plane which includes a line of intersection of said plane of slit illumination light with said image plane. Also provided are means for supporting said slit illumination system and said recording optical system as a unit for rotation about said slit axis so that orientation of the slit illumination light can be changed as desired.
Inventors
- 👤 Yukinori Karasawa
- 👤 Suminosuke Kawase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:55
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/13; A61B3/135
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
Apparatus for recording images of sections of crystalline lenses which comprises a slit illumination system for projecting a slit illumination light along a slit axis, and a recording optical system including a taking lens and an image plane, said taking lens having an optical axis intersecting at an angle with a plane containing said slit illumination light, said taking lens further having a major plane which includes a line of intersection of said plane of slit illumination light with said image plane, means for supporting said slit illumination system and said photographing optical system as a unit for rotation about said slit axis so that orientation of the slit illumination light can be changed as desired.
Claim 2
Dependent Claim
116 words
Apparatus for recording images of sections of crystalline lenses which comprises a slit illumination system for projecting a slit illumination light along a slit axis, and a recording optical system including a taking lens and an image plane, said taking lens having an optical axis intersecting at an angle with a plane containing said slit illumination light, said taking lens further having a major plane which includes a line of intersection of said plane of slit illumination light with said image plane, means for supporting said slit illumination system and said photographing optical system as a unit for rotation about said slit axis so that orientation of the slit illumination light can be changed as desired.
Claim 3
Dependent Claim
36 words
Apparatus in accordance with claim 1 in which said slit projecting system and said recording optical system are contained in a single housing means which is supported by frame means for rotation about said slit axis.
Claim 4
Dependent Claim
30 words
Apparatus in accordance with claim 2 in which said frame means is supported on base means for movements in fore and aft, left and right and up and down directions.
Claim 5
Dependent Claim
15 words
Apparatus in accordance with claim 1 in which said slit axis is extending substantially horizontally.
Claim 6
Dependent Claim
59 words
Apparatus in accordance with claim 4 which further includes angular scale means comprised of a rotatable member supported for rotation about an axis substantially parallel with said slit axis and provided with eccentric weight means so that the rotatable member always takes a predetermined orientation, and means for projecting angular scale on the rotatable member to the image plane.
Claim 7
Dependent Claim
19 words
Apparatus in accordance with claim 5 in which said rotatable member is a disc having a transparent angular scale.
Claim 8
Dependent Claim
18 words
Apparatus in accordance with claim 5 which further includes means for projecting patient's data to the image plane.
Claim 9
Dependent Claim
25 words
Apparatus in accordance with claim 1 which further includes means for mounting the photographing lens for movement in parallel with the image plane for focusing.
References Cited (Backward Citations)
US2354614A
Cited
US3519338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |