Patent US4964697A successfully refreshed from Google Patents.
US4964697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens barrel having circuit board with polygonal aperture
Assignee: Canon Inc
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Filing: 1988-11-22
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Granted: 1990-10-23
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Expires: 2008-11-22
Abstract
Abstract A lens barrel for use in an optical instrument such as a camera or other imaging device has a circuit board having an aperture which allows a light beam from a photographed object to pass therethrough. The aperture has a substantially polygonal shape which substantially coincides with an area of the light beam effective in forming an image on a recording portion including a film plane or an image sensing plane. The peripheral portion of the circuit board around the aperture provides a mounting area which is large enough to mount a large-sized IC chip which may include a zooming data processing circuit and other control circuits.
Inventors
- 👤 Yutaka Fuziwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:59
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B5/00; G02B5/005; G03; G03B; G03B2217/00; G03B2217/002
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A lens barrel comprising: a lens group with an optical axis, a body member supporting said lens group, and a circuit board having an aperture which allows a light beam from a photographed object to pass therethrough, said aperture having a substantially polygonal shape which substantially coincides with an area of said light beam effective in forming an image on a recording portion including a film plane or an image sensing plane, said aperture of said circuit board being arranged within said body member and on the optical axis of said lens group.
Claim 2
Dependent Claim
93 words
A lens barrel comprising: a lens group with an optical axis, a body member supporting said lens group, and a circuit board having an aperture which allows a light beam from a photographed object to pass therethrough, said aperture having a substantially polygonal shape which substantially coincides with an area of said light beam effective in forming an image on a recording portion including a film plane or an image sensing plane, said aperture of said circuit board being arranged within said body member and on the optical axis of said lens group.
Claim 3
Dependent Claim
30 words
A lens barrel according to claim 1, wherein said circuit board is disposed near a rear end of said body member as viewed in the direction of the optical axis.
Claim 4
Dependent Claim
15 words
A lens barrel according to claim 2, wherein said aperture has a substantially rectangular shape.
Claim 5
Dependent Claim
15 words
A lens barrel according to claim 1, wherein said aperture has a substantially rectangular shape.
Claim 6
Dependent Claim
29 words
A lens barrel according to claim 4, wherein said circuit board carries a large-sized IC chip at its portion extending along a longer side of said substantially rectangular aperture.
Claim 7
Dependent Claim
28 words
A lens barrel according to claim 5, wherein said large-sized IC chip has a data processing circuit for processing data concerning a zooming operation of said lens barrel.
Claim 8
Dependent Claim
30 words
A lens barrel according to claim 1, wherein said circuit board is disposed in the vicinity of a mount portion where said body member is coupled to an optical instrument.
Claim 9
Dependent Claim
27 words
A lens barrel according to claim 7, wherein said circuit board is electrically connected to a connecting terminal provided on said mount portion of said body member.
Claim 10
Dependent Claim
26 words
A lens barrel according to claim 8, wherein said circuit board is connected through another printed circuit board to an actuator mounted in said body member.
Claim 11
Dependent Claim
40 words
A lens barrel according to claim 1, wherein said circuit board is disposed in the vicinity of said lens group which is disposed on a rear end of said body member as viewed in the direction of said optical axis.
Claim 12
Dependent Claim
30 words
A lens barrel according to claim 1, wherein an anti-reflection means is provided on a front surface of said circuit board as viewed in the direction of the optical axis.
Claim 13
Dependent Claim
18 words
A lens barrel according to claim 11, wherein said anti-reflection means includes a layer of an anti-reflection material.
Claim 14
Dependent Claim
15 words
A lens barrel according to claim 11, wherein said anti-reflection means includes a pile layer.
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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |