US4840473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical device
Assignee: Canon Inc
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Filing: 1986-09-18
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Granted: 1989-06-20
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Expires: 2006-09-18
Abstract
Abstract An optical device is composed by sandwiching a deformable member between sandwiching members. The deformable member has a shear modulus decreasing toward the inside. The deformable member may be a combination of a core and a coating with different shear moduli or a single body having a continuoudly decreasing shear modulus. The sandwiching members may be a flat plate either transparent or opaque or a lens with or without reflecting film. Because of inner soft and outer hard elastic nature of the deformable member, the sandwiching members can easily change their relative position to change an optical path and an imaging position of the optical device with good durability.
Inventors
- 👤 Nobuo Kushibiki
- 👤 Noriyuki Nose
- 👤 Toshiyuki Nakajima
- 👤 Takeshi Baba
- 👤 Masakazu Matsugu
- 👤 Yukichi Niwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:12
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/0875; G11; G11B; G11B7/00; G11B7/08; G11B7/09
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
An optical device, comprising a plurality of sandwiching members and deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member comprising an elastomeric core and an elastomeric coating covering the core; said elastomeric core having a shear modulus in the range 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 ; said elastomeric coating having a shear modulus in the range of 1×10 4 dyn/cm 2 to 1×10 9 dyne/cm 2 .
Claim 2
Dependent Claim
86 words
An optical device, comprising a plurality of sandwiching members and deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member comprising an elastomeric core and an elastomeric coating covering the core; said elastomeric core having a shear modulus in the range 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 ; said elastomeric coating having a shear modulus in the range of 1×10 4 dyn/cm 2 to 1×10 9 dyne/cm 2 .
Claim 3
Dependent Claim
29 words
An optical device according to claim 1, wherein said elastic coating has a shear modulus in the range of 5×10 5 dyne/cm 2 to 1×10 8 dyne/cm 2 .
Claim 4
Dependent Claim
28 words
An optical device according to claim 2, wherein said elastic coating has shear modulus in the range of 5×10 5 dyne/cm 2 to 1×10 7 dyne/cm 2 .
Claim 5
Dependent Claim
28 words
An optical device according to claim 1, wherein said core has a shear modulus in the range of 1×10 3 dyne/cm 2 to 1×10 5 dyne/cm 2 .
Claim 6
Dependent Claim
14 words
An optical device according to claim 1, wherein said deformable member comprises silicone rubber.
Claim 7
Dependent Claim
16 words
An optical device according to claim 1, wherein the sandwiching members include a transparent flat plate.
Claim 8
Dependent Claim
85 words
An optical device comprising a plurality of sandwiching members and a deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member having a maximum shear modulus in the range of 1×10 4 dyne/cm 2 to 1×10 9 dyne/cm 2 and a minimum shear modulus in the range of 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 , wherein the sandwiching members include a flat plate provided with a reflecting film.
Claim 9
Dependent Claim
85 words
An optical device comprising a plurality of sandwiching members and a deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member having a maximum shear modulus in the range of 1×10 4 dyne/cm 2 to 1×10 9 dyne/cm 2 and a minimum shear modulus in the range of 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 , wherein the sandwiching members include a flat plate provided with a reflecting film.
Claim 10
Dependent Claim
79 words
An optical device comprising a plurality of sandwiching members and a deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member having a maximum shear modulus in the range of 1×10 4 dyne/cm 2 to 1×10 9 dyne/cm 2 and a minimum shear modulus in the range of 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 , wherein the sandwiching members include a lens.
Claim 11
Dependent Claim
79 words
An optical device comprising a plurality of sandwiching members and a deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member having a maximum shear modulus in the range of 1×10 4 dyne/cm 2 to 1×10 9 dyne/cm 2 and a minimum shear modulus in the range of 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 , wherein the sandwiching members include a lens.
Claim 12
Dependent Claim
84 words
An optical device comprising a plurality of sandwiching members and a deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member having a maximum shear modulus in the range of 1×10 4 dyne/cm 2 to 1×10 9 dyne/cm 2 and a minimum shear modulus in the range of 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 , wherein the sandwiching members include a lens provided with a reflecting film.
Claim 13
Dependent Claim
84 words
An optical device comprising a plurality of sandwiching members and a deformable member sandwiched by the plurality of sandwiching members, the shear modulus of the deformable member decreasing toward the inside thereof; said deformable member having a maximum shear modulus in the range of 1×10 4 dyne/cm 2 to 1×10 9 dyne/cm 2 and a minimum shear modulus in the range of 1×10 2 dyne/cm 2 to 5×10 5 dyne/cm 2 , wherein the sandwiching members include a lens provided with a reflecting film.
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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |