US3755677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hologram photographing apparatus with light measuring device
Assignee: Fujinon Corp
•
Filing: 1972-02-11
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Granted: 1973-08-28
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Expires: 1992-02-11
Abstract
Abstract In a hologram photographing apparatus wherein the light from the source is divided into two beams, one of which is projected on the object to be photographed to obtain the object light beam, the other of which is caused to project directly on the photosensitive material to obtain the reference light beam, whereby both light are superimposed to record the interference fringe patterns; a photo-receiver is arranged so as to make it possible to measure the intensity ratio between the object light beam and the reference light beam as well as the quantity of exposure; and an incident light selecting member, which causes the object light beam or the reference light beam selectively to impinge onto said photo-receiver, is arranged in the light beam path in which the object light beam and the reference light exist at the same time.
Inventors
- 👤 S Ooue
- 👤 M Hashiue
- 👤 M Kanaya
- 👤 S Kitahara
- 👤 M Noguchi
- 👤 M Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:16
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/02; G03H1/024; G03H1/0248; G03H1/04; G03H1/0486; G03H2001/0489
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A hologram photographing apparatus comprising: a coherent light source, first optical means for forming an object light beam by dividing light from the source and projecting it on an object to be photographed, second optical means for forming a reference light beam from said divided light, a photo-sensitive material arranged for recording interference fringe patterns formed by said object light beam and said reference light beam, first and second photo-receiver means arranged for enabling the measurement of the effective intensity ratio between said object light beam and said reference light beam at, and the measurement of the effective quantity of light exposure of, said photo-sensitive material, and an incident-light selecting member arranged in the light path wherein both said object light beam and said reference light beam exist together at a position optically equivalent to the surface of said photosensitive material, said incident-light selecting member causing said object light beam and said reference light beam to project separately and respectively on said photo-receiver means, whereby said measurements can be effected.
Claim 2
Dependent Claim
170 words
A hologram photographing apparatus comprising: a coherent light source, first optical means for forming an object light beam by dividing light from the source and projecting it on an object to be photographed, second optical means for forming a reference light beam from said divided light, a photo-sensitive material arranged for recording interference fringe patterns formed by said object light beam and said reference light beam, first and second photo-receiver means arranged for enabling the measurement of the effective intensity ratio between said object light beam and said reference light beam at, and the measurement of the effective quantity of light exposure of, said photo-sensitive material, and an incident-light selecting member arranged in the light path wherein both said object light beam and said reference light beam exist together at a position optically equivalent to the surface of said photosensitive material, said incident-light selecting member causing said object light beam and said reference light beam to project separately and respectively on said photo-receiver means, whereby said measurements can be effected.
Claim 3
Dependent Claim
26 words
Hologram photographing apparatus as claimed in claim 1, wherein said incident light selecting member and said photo-receivers are arranged on the surface of said photo-sensitive material.
Claim 4
Dependent Claim
34 words
Hologram photographing apparatus as claimed in claim 1, wherein said second optical means comprises a light quantity adjusting member for adjusting the intensity ratio between said object light beam and said reference light beam.
Claim 5
Dependent Claim
24 words
Hologram photographing apparatus as claimed in claim 2, wherein said incident light selecting member and said photo-receiver means are removable from said photo-sensitive material.
Claim 6
Dependent Claim
31 words
Hologram photographing apparatus as claimed in claim 1, wherein said incident-light selecting member comprises mechanical means for selectively projecting said object light beam and said reference light on said photo-receiver means.
Claim 7
Dependent Claim
28 words
Hologram photographing apparatus as claimed in claim 1, wherein said incident-light selecting member comprises third optical means for projecting said object light beam or said reference light beam.
References Cited (Backward Citations)
US3353462A
Cited
US3572882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |