Patent US4432540A successfully refreshed from Google Patents.
Patent US5236541A successfully refreshed from Google Patents.
US5236541A
Expired / Lapsed
US
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Joined prism assembly and method and apparatus for manufacturing same
Assignee: Pentax Corp
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Filing: 1992-04-01
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Granted: 1993-08-17
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Expires: 2012-04-01
Abstract
Abstract A joined prism assembly having more than two prisms adhered to each other at joining surfaces is disclosed. The joined prism includes stepped portions between the end faces of the prisms adjacent to the joining surfaces for defining exposed positioning reference surfaces for when the prisms are adhered to each other.
Inventors
- 👤 Bunkichi Sugahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:33
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/1006; G02B27/102; G02B27/1073; G02B27/14; G02B27/149; G02B5/00; G02B5/04; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1744
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
209 words
An apparatus for manufacturing a joined prism assembly having a plurality of prism half-assemblies, each having more than one prism adhered to each other at joining surfaces, and having at least one exposed reference surface for positioning, wherein said apparatus comprises: prism supporting means for holding one of said prism half-assemblies at a predetermined position, including first reference surfaces with which outer surfaces of said prism half-assembly can come into contact and at least one second reference surface with which an exposed reference surface can come into contact, positioning means for positioning another prism half-assembly which is located on and adhered to said one prism half-assembly held by said prism supporting means, said positioning means provided with a third reference surface having a predetermined relationship to said second reference surface, and said prism assembly being in the shape of a rectangular parallelpiped and includes two wide and two narrow right-angle prisms having an isosceles right triangle cross-sectional shape and adhered to each other at their adjacent sides defining right-angle apexes, each of said prism half-assemblies having at least one stepped portion between end faces of the prisms adjacent to said joining surfaces for defining at least one exposed positioning reference surface when said prisms are adhered to each other.
Claim 2
Independent Claim
209 words
An apparatus for manufacturing a joined prism assembly having a plurality of prism half-assemblies, each having more than one prism adhered to each other at joining surfaces, and having at least one exposed reference surface for positioning, wherein said apparatus comprises: prism supporting means for holding one of said prism half-assemblies at a predetermined position, including first reference surfaces with which outer surfaces of said prism half-assembly can come into contact and at least one second reference surface with which an exposed reference surface can come into contact, positioning means for positioning another prism half-assembly which is located on and adhered to said one prism half-assembly held by said prism supporting means, said positioning means provided with a third reference surface having a predetermined relationship to said second reference surface, and said prism assembly being in the shape of a rectangular parallelpiped and includes two wide and two narrow right-angle prisms having an isosceles right triangle cross-sectional shape and adhered to each other at their adjacent sides defining right-angle apexes, each of said prism half-assemblies having at least one stepped portion between end faces of the prisms adjacent to said joining surfaces for defining at least one exposed positioning reference surface when said prisms are adhered to each other.
Claim 3
Dependent Claim
38 words
The apparatus according to claim 1, wherein said positioning means positions said other prism half-assembly on said one prism half-assembly held on said prism supporting means, with the help of said reference surface of said other prism half-assembly.
Claim 4
Dependent Claim
63 words
The apparatus according to claim 1, wherein said prism supporting means comprises a pair of oblique surfaces with which adjacent side faces of said one prism half-assembly defining one of said right angle apexes thereof can come into contact and at least one vertical reference surface with which said at least one exposed reference surface of said prism half-assembly can come into contact.
Claim 5
Dependent Claim
38 words
The apparatus according to claim 1, wherein said positioning means comprises said at least one vertical reference surface which lies in the same vertical plane as said at least one vertical reference surface of said prism supporting means.
Claim 6
Dependent Claim
36 words
The apparatus according to claim 4, wherein said at least one vertical reference surface of said positioning means faces in a direction opposite to said at least one vertical reference surface of said prism supporting means.
Claim 7
Dependent Claim
36 words
The apparatus according to claim 4, wherein said at least one vertical reference surface of said positioning means faces in the same direction as said at least one vertical reference surface of said prism supporting means.
Claim 8
Dependent Claim
25 words
The apparatus according to claim 5, wherein said positioning means comprises a movable member on which said at least one vertical reference surface is provided.
Claim 9
Dependent Claim
25 words
The apparatus according to claim 6, wherein said positioning means comprises a movable member on which said at least one vertical reference surface is provided.
Claim 10
Dependent Claim
19 words
The apparatus according to claim 7, further comprising a base plate on which said movable member is movably supported.
Claim 11
Dependent Claim
19 words
The apparatus according to claim 8, further comprising a base plate on which said movable member is movably supported.
Claim 12
Dependent Claim
22 words
The apparatus according to claim 9, further comprising a stop for restricting the movement of said movable plate on said base plate.
Claim 13
Dependent Claim
22 words
The apparatus according to claim 10, further comprising a stop for restricting the movement of said movable plate on said base plate.
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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) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |