US3580153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture position selecting system for use with multiphotographic device
Assignee: Ricoh Co Ltd
•
Filing: 1968-10-02
•
Granted: 1971-05-25
•
Expires: 1988-10-02
Abstract
Abstract A multiphotographic device has an objective lens positioned to form a real image which serves as an object for a compound second lens. Immediately behind the objective lens are located a pair of superimposed shield plates movable transversely in orthogonal directions. Each plate is provided with a slot extending perpendicular to its direction of movement; the slots defining a rectangular aperture which admits light to the second lens from the first. Motion of the plates is controlled by a pair of cams. Each cam controls the excursion of a shield plate causing the aperture to advance in steps from a starting position to an extreme position while leaving gaps between the steps, and then back to the starting position in steps during a return movement. The aperture, during the return movement, occupies the gaps.
Inventors
- 👤 Yoshio Fukushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:45
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/08; G03B19/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
192 words
A multiphotographic device comprising a lens, an aperture movable in a plane which is vertical to the optical axis, and behind the aperture an array of microlenses positioned to focus on sensitive material behind the microlenses a plurality of partial pictures, the aperture being defined by the intersection of two slots in two plates which are movable relative to each other, the slot in each plate extending transverse to the direction of movement of said plate, and driving means for moving the slot of one plate over the length of the slot of the other plate during each cycle of exposure so that the plates are movable stepwise in a direction perpendicular to each other, the slot of the other plate being reciprocated in each position of the first plate over the length of the slot of the first plate, the plates during the outward movement in one direction skip each second possible position of their slot and on their return movement omit the position on which the slots have been during the outward movement, the end position of the slot of each plate being adjacent the beginning position of the slot.
Claim 2
Dependent Claim
192 words
A multiphotographic device comprising a lens, an aperture movable in a plane which is vertical to the optical axis, and behind the aperture an array of microlenses positioned to focus on sensitive material behind the microlenses a plurality of partial pictures, the aperture being defined by the intersection of two slots in two plates which are movable relative to each other, the slot in each plate extending transverse to the direction of movement of said plate, and driving means for moving the slot of one plate over the length of the slot of the other plate during each cycle of exposure so that the plates are movable stepwise in a direction perpendicular to each other, the slot of the other plate being reciprocated in each position of the first plate over the length of the slot of the first plate, the plates during the outward movement in one direction skip each second possible position of their slot and on their return movement omit the position on which the slots have been during the outward movement, the end position of the slot of each plate being adjacent the beginning position of the slot.
Claim 3
Dependent Claim
331 words
In a multiphotographic device having an objective lens with an optical axis and a compound lens comprised of a plurality of microlenses positioned behind the objective lens on the optical axis, the improvement comprising: a lightproof shield occluding the pathway of light from the object being photographed through the objective lens to the compound lens, said shield comprising a first shield plate movable along a first path transverse to the optical axis in an outward movement and a return movement, a second shield plate movable along a second path transverse to the optical axis and to the first path in an outward movement and a return movement, a first slot in the first shield plate, said first slot extending transverse to the first path, and a second slot in the second shield plate, said second slot extending transverse to the second path and overlappiNg the first slot, said first and second slots extending transversely to each other and defining an aperture through the shield plates, said aperture affording a passage for light from the object being photographed to the compound lens; means for successively moving the first shield plate to a plurality of photographing positions during the outward movement, said positions being separated by first gaps; means for successively moving the first shield plate to a plurality of photographing positions during the return movement, said positions being located in said first gaps; means for successively moving the second shield plate to a plurality of photographing positions during the outward movement, said positions being separated by second gaps; means for successively moving the second shield plate to a plurality of photographing positions during the return movement, said positions being located in said second gaps; and the first and second shield plates defining, when each is in a photographing position, a photographing aperture, said photographing aperture varying in position when a shield plate is moved from one photographing position to another, and the various positions of the photographing aperture being in nonoverlapping relation.
Claim 4
Dependent Claim
331 words
In a multiphotographic device having an objective lens with an optical axis and a compound lens comprised of a plurality of microlenses positioned behind the objective lens on the optical axis, the improvement comprising: a lightproof shield occluding the pathway of light from the object being photographed through the objective lens to the compound lens, said shield comprising a first shield plate movable along a first path transverse to the optical axis in an outward movement and a return movement, a second shield plate movable along a second path transverse to the optical axis and to the first path in an outward movement and a return movement, a first slot in the first shield plate, said first slot extending transverse to the first path, and a second slot in the second shield plate, said second slot extending transverse to the second path and overlappiNg the first slot, said first and second slots extending transversely to each other and defining an aperture through the shield plates, said aperture affording a passage for light from the object being photographed to the compound lens; means for successively moving the first shield plate to a plurality of photographing positions during the outward movement, said positions being separated by first gaps; means for successively moving the first shield plate to a plurality of photographing positions during the return movement, said positions being located in said first gaps; means for successively moving the second shield plate to a plurality of photographing positions during the outward movement, said positions being separated by second gaps; means for successively moving the second shield plate to a plurality of photographing positions during the return movement, said positions being located in said second gaps; and the first and second shield plates defining, when each is in a photographing position, a photographing aperture, said photographing aperture varying in position when a shield plate is moved from one photographing position to another, and the various positions of the photographing aperture being in nonoverlapping relation.
Claim 5
Dependent Claim
16 words
The device of claim 2 wherein the shield plates are disposed immediately behind the objective lens.
Claim 6
Dependent Claim
30 words
The device of claim 2 wherein the first and second paths are substantially perpendicular and the first and second slots are substantially perpendicular to the first and second paths, respectively.
Claim 7
Dependent Claim
163 words
The device of claim 4 wherein: the means for successively moving the first shield plate comprises a first cam follower movable with the first shield plate, and a first cam rotatable about a first cam axis in driving relation with the first cam follower, said first cam having a number of contact surfaces positioned equiangularly around the first cam axis, each said contact surface being the arc of a circle having a center at the first cam axis; the means for successively moving the second shield plate comprises a second cam follower movable with the second shield plate, and a second cam rotatable about a second cam axis in driving relation with the second cam follower, said second cam having a number of contact surfaces positioned equiangularly around the second cam axis, each said contact surface being the arc of a circle having a center at the second cam axis; and the shield plates are disposed in close proximity to the objective lens.
Claim 8
Dependent Claim
37 words
The device of claim 5 comprising intermittent drive means for rotating the second cam a distance sufficient to move the second shield plate from one photographing position to another upon each complete revolution of the first cam.
Claim 9
Dependent Claim
29 words
The device of claim 2 wherein the means for successively moving the first shield plate comprises a first cam and a first cam follower connected to the shield plate.
Claim 10
Dependent Claim
30 words
The device of claim 7 wherein the means for successively moving the second shield plate comprises a second cam and a second cam follower connected to the second shield plate.
Claim 11
Dependent Claim
15 words
The device of claim 7 wherein the first cam is rotatable about a first axis.
Claim 12
Dependent Claim
16 words
The device of claim 9 wherein the second cam is rotatable about a second cam axis.
Claim 13
Dependent Claim
38 words
The device of claim 9 wherein the first and second cams have cam contours which are arcs of circles centered at the cam axes and which contact the cam followers when the shield plates are in photographing positions.
Claim 14
Dependent Claim
37 words
The device of claim 11 comprising intermittent drive means for rotating the second cam a distance sufficient to move the second shield plate from one photographing position to another upon each complete revolution of the first cam.
Claim 15
Independent Claim
304 words
A method of positioning an exposure aperture for successive exposures in an optical device having an objective lens, a compound lens comprised of a plurality of microlenses, and a lightproof shield adjacent the objective lens, said shield being movable and having an aperture therethrough, said method comprising: moving the shield in an outward movement to position the aperture successively at spaced intervals separated by gaps along a first row of aperture positions; moving the shield in a return movement to position the aperture successively at spaced intervals along the first row of aperture positions, the aperture being positioned during the return movement in the gaps in the first row left during the outward movement; moving the shield in an outward movement to position the aperture successively at spaced intervals separated by gaps along a second row of aperture positions, said second row being separated from the first row by a gap; moving the shield in a return movement to position the aperture successively at spaced intervals separated by gaps along a second row of aperture positions, said second row being separated along the second row of aperture positions, the aperture being positioned during the return movement in the gaps in the second row left during the outward movement; moving the shield in an outward movement to position the aperture successively at spaced intervals separated by gaps along a third row of aperture positions, said third row being in the gap between the first and second rows of aperture positions; moving the shield in a return movement to position the aperture successively at spaced intervals along the third row of aperture positions, the aperture being positioned during the return movement in the gaps in the third row left during the outward movement; and locating all the aperture positions so that none of said positions overlap.
Claim 16
Independent Claim
304 words
A method of positioning an exposure aperture for successive exposures in an optical device having an objective lens, a compound lens comprised of a plurality of microlenses, and a lightproof shield adjacent the objective lens, said shield being movable and having an aperture therethrough, said method comprising: moving the shield in an outward movement to position the aperture successively at spaced intervals separated by gaps along a first row of aperture positions; moving the shield in a return movement to position the aperture successively at spaced intervals along the first row of aperture positions, the aperture being positioned during the return movement in the gaps in the first row left during the outward movement; moving the shield in an outward movement to position the aperture successively at spaced intervals separated by gaps along a second row of aperture positions, said second row being separated from the first row by a gap; moving the shield in a return movement to position the aperture successively at spaced intervals separated by gaps along a second row of aperture positions, said second row being separated along the second row of aperture positions, the aperture being positioned during the return movement in the gaps in the second row left during the outward movement; moving the shield in an outward movement to position the aperture successively at spaced intervals separated by gaps along a third row of aperture positions, said third row being in the gap between the first and second rows of aperture positions; moving the shield in a return movement to position the aperture successively at spaced intervals along the third row of aperture positions, the aperture being positioned during the return movement in the gaps in the third row left during the outward movement; and locating all the aperture positions so that none of said positions overlap.
Claim 17
Independent Claim
286 words
A method of positioning an exposure aperture for successive exposures in an optical device having an objective lens with an optical axis, a compound lens comprised of a plurality of microlenses, and a lightproof shield adjacent the objective lens, said shield being comprised of a first shield plate movable along a first path transverse to the optical axis in an outward movement and a return movement, and a second shield plate movable along a second path transverse to the optical axis and to the first path in an outward movement and a return movement, said first shield plate having a first slot extending transverse to the first path and said second shield plate having a second slot extending transverse to the second path and also transverse to the first slot, whereby said slots define an exposure aperture through the shield at their crossing, said method comprising: a. positioning the second shield plate in a first position; b. moving the first shield plate in the outward movement successively to a plurality of exposure positions separated by gaps without moving the second shield plate; c. moving the first shield plate in the return movement successively to a plurality of exposure positions in the gaps without moving the second shield plate; d. moving the second shield plate in the outward movement to a second position separated from the first position by a gap and repeating steps (a) and (b) above; e. moving the second shield plate in the return movement to a third position in the gap between the first position and the second position, and repeating steps (a) and (b) above; and f. insuring that the exposure positions defined by the first and second shield plates are nonoverlapping.
Claim 18
Independent Claim
286 words
A method of positioning an exposure aperture for successive exposures in an optical device having an objective lens with an optical axis, a compound lens comprised of a plurality of microlenses, and a lightproof shield adjacent the objective lens, said shield being comprised of a first shield plate movable along a first path transverse to the optical axis in an outward movement and a return movement, and a second shield plate movable along a second path transverse to the optical axis and to the first path in an outward movement and a return movement, said first shield plate having a first slot extending transverse to the first path and said second shield plate having a second slot extending transverse to the second path and also transverse to the first slot, whereby said slots define an exposure aperture through the shield at their crossing, said method comprising: a. positioning the second shield plate in a first position; b. moving the first shield plate in the outward movement successively to a plurality of exposure positions separated by gaps without moving the second shield plate; c. moving the first shield plate in the return movement successively to a plurality of exposure positions in the gaps without moving the second shield plate; d. moving the second shield plate in the outward movement to a second position separated from the first position by a gap and repeating steps (a) and (b) above; e. moving the second shield plate in the return movement to a third position in the gap between the first position and the second position, and repeating steps (a) and (b) above; and f. insuring that the exposure positions defined by the first and second shield plates are nonoverlapping.
References Cited (Backward Citations)
US728104A
Cited
US1103745A
Cited
US1782860A
Cited
US2186610A
Cited
US2950644A
Cited
US3387547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |