US6231192B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projecting optical system
Assignee: Minolta Co Ltd
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Filing: 1999-06-17
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Granted: 2001-05-15
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Expires: 2019-06-17
Abstract
Abstract A projecting optical system has a plurality of display panels, a color integrating mirror, a projection optical system, a correcting member, and a lens member. The color integrating mirror, disposed at an angle to any of the display panels, integrates the images displayed on the display panels into a single color-integrated image by reflecting a light component covering a specific wavelength range and transmitting light components covering other wavelength ranges than the specific wavelength range. The projection optical system projects the color-integrated image onto a screen. The correcting member, disposed within the projection optical system, corrects the astigmatic difference caused by the color integrating mirror. The lens member, disposed on the color-integrating-mirror side of the correcting member, corrects the astigmatic difference caused by the color integrating mirror.
Inventors
- 👤 Kenji Konno
- 👤 Kohtaro Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:10
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N5/00; H04N5/74; H04N5/7416
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
128 words
A projecting optical system comprising: a plurality of display panels; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a single color-integrated image by reflecting a light component covering a specific wavelength range and transmitting light components covering other wavelength ranges than the specific wavelength range; a projection optical system for projecting the color-integrated image onto a screen; a correcting member, disposed within the projection optical system, for correcting at least a portion of an astigmatic difference caused by the color integrating mirror; and a lens member, disposed on a color-integrating-mirror side of the correcting member disposed within the projection optical system, for further correcting the astigmatic difference caused by the color integrating mirror.
Claim 2
Dependent Claim
128 words
A projecting optical system comprising: a plurality of display panels; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a single color-integrated image by reflecting a light component covering a specific wavelength range and transmitting light components covering other wavelength ranges than the specific wavelength range; a projection optical system for projecting the color-integrated image onto a screen; a correcting member, disposed within the projection optical system, for correcting at least a portion of an astigmatic difference caused by the color integrating mirror; and a lens member, disposed on a color-integrating-mirror side of the correcting member disposed within the projection optical system, for further correcting the astigmatic difference caused by the color integrating mirror.
Claim 3
Dependent Claim
32 words
A projecting optical system as claimed in claim 1 , wherein the color integrating mirror is composed of at least one dichroic mirror having a dichroic surface sandwiched between transparent base plates.
Claim 4
Dependent Claim
66 words
A projecting optical system as claimed in claim 1 , wherein the correcting member is a flat plate and is decentered by being so inclined that a plane including a normal to the correcting member and an optical axis of the projection optical system is perpendicular to a plane including a normal to the color integrating mirror and the optical axis of the projection optical system.
Claim 5
Dependent Claim
19 words
A projecting optical system as claimed in claim 1 , wherein the lens member is a decentered condenser lens.
Claim 6
Dependent Claim
45 words
A projecting optical system as claimed in claim 4 , wherein the condenser lens is decentered in a direction substantially perpendicular to a direction in which the color integrating mirror is inclined, and has an optical axis passing outside display areas of the display panels.
Claim 7
Dependent Claim
174 words
A projector comprising: a light source unit for emitting white light; a color separating unit for separating the white light emitted from the light source unit into a plurality of light components of different colors corresponding to different wavelength ranges; a plurality of display panels illuminated individually by the light components of different colors thus separated; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a single color-integrated image by reflecting a light component covering a specific wavelength range and transmitting light components covering other wavelength ranges than the specific wavelength range; a projection optical system for projecting the color-integrated image onto a screen; a correcting member, disposed within the projection optical system, for correcting at least a portion of an astigmatic difference caused by the color integrating mirror; and a lens member, disposed on a color-integrating-mirror side of the correcting member disposed within the projection optical system, for further correcting the astigmatic difference caused by the color integrating mirror.
Claim 8
Dependent Claim
174 words
A projector comprising: a light source unit for emitting white light; a color separating unit for separating the white light emitted from the light source unit into a plurality of light components of different colors corresponding to different wavelength ranges; a plurality of display panels illuminated individually by the light components of different colors thus separated; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a single color-integrated image by reflecting a light component covering a specific wavelength range and transmitting light components covering other wavelength ranges than the specific wavelength range; a projection optical system for projecting the color-integrated image onto a screen; a correcting member, disposed within the projection optical system, for correcting at least a portion of an astigmatic difference caused by the color integrating mirror; and a lens member, disposed on a color-integrating-mirror side of the correcting member disposed within the projection optical system, for further correcting the astigmatic difference caused by the color integrating mirror.
Claim 9
Dependent Claim
32 words
A projecting optical system as claimed in claim 6 , wherein the color integrating mirror is composed of at least one dichroic mirror having a dichroic surface sandwiched between transparent base plates.
Claim 10
Dependent Claim
66 words
A projecting optical system as claimed in claim 6 , wherein the correcting member is a flat plate and is decentered by being so inclined that a plane including a normal to the correcting member and an optical axis of the projection optical system is perpendicular to a plane including a normal to the color integrating mirror and the optical axis of the projection optical system.
Claim 11
Dependent Claim
19 words
A projecting optical system as claimed in claim 6 , wherein the lens member is a decentered condenser lens.
Claim 12
Dependent Claim
45 words
A projecting optical system as claimed in claim 9 , wherein the condenser lens is decentered in a direction substantially perpendicular to a direction in which the color integrating mirror is inclined, and has an optical axis passing outside display areas of the display panels.
Claim 13
Dependent Claim
67 words
A projecting optical system comprising: a plurality of display panels; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a color-integrated image; a projection optical system for projecting the color-integrated image onto a screen; and a correcting member, disposed within the projection optical system, for correcting an astigmatic difference in the color-integrated image.
Claim 14
Dependent Claim
67 words
A projecting optical system comprising: a plurality of display panels; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a color-integrated image; a projection optical system for projecting the color-integrated image onto a screen; and a correcting member, disposed within the projection optical system, for correcting an astigmatic difference in the color-integrated image.
Claim 15
Dependent Claim
32 words
A projecting optical system as claimed in claim 11 , wherein the color integrating mirror is composed of at least one dichroic mirror having a dichroic surface sandwiched between transparent base plates.
Claim 16
Dependent Claim
66 words
A projecting optical system as claimed in claim 11 , wherein the correcting member is a flat plate and is decentered by being so inclined that a plane including a normal to the correcting member and an optical axis of the projection optical system is perpendicular to a plane including a normal to the color integrating mirror and the optical axis of the projection optical system.
Claim 17
Dependent Claim
18 words
A projecting optical system as claimed in claim 11 , wherein the correcting member is a cylindrical lens.
Claim 18
Dependent Claim
102 words
A projector comprising: a light source unit for emitting white light; a color separating unit for separating the white light emitted from the light source unit into a plurality of light components; a plurality of display panels illuminated individually by the light components; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a color-integrated image; a projection optical system for projecting the color-integrated image onto a screen; and a correcting member, disposed within the projection optical system, for correcting an astigmatic difference caused by the color integrating mirror.
Claim 19
Dependent Claim
102 words
A projector comprising: a light source unit for emitting white light; a color separating unit for separating the white light emitted from the light source unit into a plurality of light components; a plurality of display panels illuminated individually by the light components; a color integrating mirror, disposed at an angle to any of the display panels, for integrating images displayed on the display panels into a color-integrated image; a projection optical system for projecting the color-integrated image onto a screen; and a correcting member, disposed within the projection optical system, for correcting an astigmatic difference caused by the color integrating mirror.
Claim 20
Dependent Claim
32 words
A projecting optical system as claimed in claim 15 , wherein the color integrating mirror is composed of at least one dichroic mirror having a dichroic surface sandwiched between transparent base plates.
Claim 21
Dependent Claim
66 words
A projecting optical system as claimed in claim 15 , wherein the correcting member is a flat plate and is decentered by being so inclined that a plane including a normal to the correcting member and an optical axis of the projection optical system is perpendicular to a plane including a normal to the color integrating mirror and the optical axis of the projection optical system.
Claim 22
Dependent Claim
18 words
A projecting optical system as claimed in claim 15 , wherein the correcting member is a cylindrical lens.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-14 | 2004-11-13 | 2005-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-14 | 2008-11-13 | 2009-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-14 | 2012-11-13 | 2013-05-15 | $7700.00 | Window Closed / Lapsed |