US4523807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a member having microstructure elements arranged thereon
Assignee: Canon Inc
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Filing: 1984-05-25
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Granted: 1985-06-18
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Expires: 2004-05-25
Abstract
Abstract Method for a member having microstructure elements arranged thereon. Three or more coherent beams are projected on a recording material from finite angular directions relative to each other to form a pattern on the recording material. The pattern recorded on the recording material is subjected to a developing treatment to obtain microstructure elements.
Inventors
- 👤 Takashi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:32
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/0006; G02B3/0037; G02B3/0056; G02B5/00; G02B5/02; G02B5/0205; G02B5/021; G02B5/0215; G02B5/0221; G02B5/0268; G02B3/0043
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
70 words
A method of making a microstructure member, comprising: providing light beams which are emitted from an arrangement of two or more light sources and which are interferable with one another; superposing the light beams axially without re-imaging to produce equally spaced interference fringes having two-dimensional monotonous periodicity; and exposing a recording medium to the produced interference fringes with a fixed relative position between the interference fringes and the recording medium.
Claim 2
Independent Claim
70 words
A method of making a microstructure member, comprising: providing light beams which are emitted from an arrangement of two or more light sources and which are interferable with one another; superposing the light beams axially without re-imaging to produce equally spaced interference fringes having two-dimensional monotonous periodicity; and exposing a recording medium to the produced interference fringes with a fixed relative position between the interference fringes and the recording medium.
Claim 3
Dependent Claim
35 words
A method according to claim 1, wherein said light source arrangement includes three point light sources for emitting beams which are interferable with one another, said three point light sources being located on a circle.
Claim 4
Dependent Claim
35 words
A method according to claim 1, wherein said light source arrangement includes three point light sources for emitting beams which are interferable with one another, said three point light sources being located on an ellipse.
Claim 5
Dependent Claim
39 words
A method according to claim 1, wherein said light source arrangement includes three point light sources for emitting beams which are interferable with one another, said three point light sources being located at apexes of a substantially equilateral triangle.
Claim 6
Dependent Claim
35 words
A method according to claim 1, wherein said light source arrangement includes four point light sources for emitting beams which are interferable with one another, said four point light sources being located on a circle.
Claim 7
Dependent Claim
35 words
A method according to claim 1, wherein said light source arrangement includes four point light sources for emitting beams which are interferable with one another, said four point light sources being located on an ellipse.
Claim 8
Dependent Claim
36 words
A method according to claim 1, wherein said light source arrangement includes four point light sources for emitting beams which are interferable with one another, said four point light sources being located at apexes of square.
Claim 9
Dependent Claim
21 words
A method according to claim 1, wherein said light source arrangement includes four point light sources located at apexes of lozenge.
Claim 10
Dependent Claim
33 words
An image projection screen, such as a focussing screen of a camera produced by a method according to any one of claims 1 through 8, wherein the microstructure is of a relief type.
Claim 11
Dependent Claim
73 words
An image projection screen having a microstructure member prepared by the method according to any one of claims 9 through 8, wherein said microstructure member has a periodic structure (ls/mm), and the resolving power (li/mm) of a projected image on said screen and the resolving power (lo/mm) of a projected image observation system to the pattern on said screen are related according to: lo≃ls˜li (difference between ls and li) (1) or lo>ls˜li (2).
Claim 12
Dependent Claim
27 words
A microstructure member produced by a method according to any one of claims 1 through 8, which has a mesh structure through which a material is passed.
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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |