Patent US5293188A successfully refreshed from Google Patents.
US5293188A
Expired / Lapsed
US
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Reflecting illumination type projecting device
Assignee: Pentax Corp
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Filing: 1992-12-10
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Granted: 1994-03-08
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Expires: 2012-12-10
Abstract
Abstract A reflecting illumination type projecting device includes a projecting lens having an optical axis intersecting an object to be tested, a light source portion for illuminating the object through the projecting lens, a screen onto which an image of the object is projected by light reflected on the object through the projecting lens, and an optical path separating element disposed in the vicinity of an exit pupil, the element being formed with a total reflecting mirror portion for reflecting either the illuminating light or the reflected light and with a transmitting portion for transmitting the remaining light, thereby to make the illuminating light incident to the projecting lens and to guide the reflected light toward the screen.
Inventors
- 👤 Kazushi Yoshida
- 👤 Ryota Ogawa
- 👤 Tetsuya Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:45
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/06; Y; Y10; Y10S; Y10S353/00; Y10S353/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
130 words
A reflecting illumination type projecting device, comprising: a projection lens having an optical axis intersecting an object having a pattern to be projected; a light source for illuminating said object through said projecting lens; a screen onto which an image of said object is projected by light that is reflected from said object and which passes through said projecting lens; and an optical path separating element disposed substantially at an exit pupil of said projecting lens, said optical path separating element being formed with a total reflecting mirror portion for reflecting substantially all illumination light or reflected light, said optical path separating element having a transmitting portion for transmitting a remaining light, thereby making said illumination light incident to said projecting lens and guiding said reflecting light towards said screen.
Claim 2
Dependent Claim
130 words
A reflecting illumination type projecting device, comprising: a projection lens having an optical axis intersecting an object having a pattern to be projected; a light source for illuminating said object through said projecting lens; a screen onto which an image of said object is projected by light that is reflected from said object and which passes through said projecting lens; and an optical path separating element disposed substantially at an exit pupil of said projecting lens, said optical path separating element being formed with a total reflecting mirror portion for reflecting substantially all illumination light or reflected light, said optical path separating element having a transmitting portion for transmitting a remaining light, thereby making said illumination light incident to said projecting lens and guiding said reflecting light towards said screen.
Claim 3
Dependent Claim
71 words
The reflecting illumination type projection device according to claim 1, wherein the optical axis of said light source and the optical path of said projecting lens generally perpendicularly intersect each other, said optical path separating element being disposed such that said total reflecting mirror portion is positioned only on one side, with respect to a diameter of said projecting lens, in order to reflect said illuminating light towards said projecting lens.
Claim 4
Dependent Claim
68 words
The reflecting illumination type projecting device according to claim 1, wherein the optical axis at a side of said screen, generally perpendicularly intersects the optical axis of said projecting lens, said optical path separating element being disposed such that said total reflecting mirror portion is situated only on one side, with respect to a diameter of said projecting lens in order to reflect illuminating light towards said screen.
Claim 5
Dependent Claim
70 words
The reflecting illumination type projecting device according to claim 1, wherein the optical axis of said light source and the optical path of said projecting lens generally perpendicularly intersect each other, said optical path separating element being disposed such that said total reflecting mirror portion is positioned on one side, with respect to a diameter of said projecting lens, in order to reflect said illuminating light towards said projecting lens.
Claim 6
Dependent Claim
67 words
The reflecting illumination type projecting device according to claim 1, wherein the optical axis at a side of said screen generally perpendicularly intersects the optical axis of said projecting lens, said optical path separating element being disposed such that total reflecting mirror portion is situated on one side, with respect to a diameter of said projecting lens, in order to reflect said illuminating light towards the screen.
Claim 7
Dependent Claim
35 words
The reflecting illumination type projecting device according to claim 1, said light source comprising means for generating illumination light and a condenser lens for condensing illumination light onto the optical axis of said projecting lens.
Claim 8
Dependent Claim
17 words
The reflecting illumination type projection device according to claim 1, said light source comprising a xenon lamp.
Claim 9
Dependent Claim
18 words
The reflecting illumination type projecting device according to claim 1, said projecting lens being telecentric towards the object.
Claim 10
Dependent Claim
20 words
The reflecting illumination type projecting device according to claim 1, said projecting lend being capable of varying the focal length.
Claim 11
Dependent Claim
17 words
The reflecting illumination type projecting device according to claim 9, said projecting lens comprising a zoom lens.
Claim 12
Dependent Claim
55 words
The reflecting illumination type projecting device according to claim 1, wherein said total reflecting mirror portion comprises means for reflecting substantially all of said illumination light or reflected light along a first path, and said transmitting portion comprises means for transmitting said remaining light along a second path that is separate from said first path.
Claim 13
Dependent Claim
42 words
The reflecting illumination projecting device according to claim 1, wherein said screen is disposed in a position displaced towards a side that light flux coming from said light source is made incident to said projecting lens with respect to the optical axis.
Claim 14
Dependent Claim
145 words
A reflecting illumination type projecting device, comprising: a projecting lens having an optical axis intersecting an object having a pattern to be projected; a light source for illuminating said object through said projecting lens; a screen onto which an image of said object is projected by light that is reflected from said object and passed through said projecting lens; and an optical path separating element disposed substantially at an exit pupil of said projecting lens, said optical path separating element being formed with a first total reflecting mirror portion for reflecting substantially all of an illuminating light, so that illuminating light is made incident to said projection lens, and a second total reflecting mirror portion for reflecting substantially all of a reflected light, so that said reflected light is guided to a side of said screen having a diameter of said projecting lens positioned therebetween.
Claim 15
Dependent Claim
145 words
A reflecting illumination type projecting device, comprising: a projecting lens having an optical axis intersecting an object having a pattern to be projected; a light source for illuminating said object through said projecting lens; a screen onto which an image of said object is projected by light that is reflected from said object and passed through said projecting lens; and an optical path separating element disposed substantially at an exit pupil of said projecting lens, said optical path separating element being formed with a first total reflecting mirror portion for reflecting substantially all of an illuminating light, so that illuminating light is made incident to said projection lens, and a second total reflecting mirror portion for reflecting substantially all of a reflected light, so that said reflected light is guided to a side of said screen having a diameter of said projecting lens positioned therebetween.
Claim 16
Dependent Claim
149 words
A reflecting illuminating projecting device comprising: a projecting lens having an optical axis intersecting an object having a pattern to be projected; a light source for illuminating said object through said projecting lens; ring light flux forming means for forming illuminating light from said light source into a ring shape; a screen onto which an image of said object is projected by light that is reflected from said object and passed through said projecting lens; and an optical path separating element disposed substantially at an exit pupil of said projecting lens, said optical path separating element being provided, at a peripheral portion of said optical path separating element with respect to the optical axis of said projecting lens, with a total reflecting mirror portion for reflecting an illuminating light towards said projecting lens and, at a central portion, with a transmitting portion for transmitting reflected light towards said screen.
Claim 17
Dependent Claim
149 words
A reflecting illuminating projecting device comprising: a projecting lens having an optical axis intersecting an object having a pattern to be projected; a light source for illuminating said object through said projecting lens; ring light flux forming means for forming illuminating light from said light source into a ring shape; a screen onto which an image of said object is projected by light that is reflected from said object and passed through said projecting lens; and an optical path separating element disposed substantially at an exit pupil of said projecting lens, said optical path separating element being provided, at a peripheral portion of said optical path separating element with respect to the optical axis of said projecting lens, with a total reflecting mirror portion for reflecting an illuminating light towards said projecting lens and, at a central portion, with a transmitting portion for transmitting reflected light towards said screen.
Claim 18
Dependent Claim
52 words
The reflecting illumination projection device according to claim 14, wherein said ring light flux forming means comprises a small-sized mirror including a mirror surface for reflecting and illuminating light, and a large sized mirror including a mirror surface for reflecting the reflected light from said small sized mirror into said ring shape.
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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) | 1997-03-07 | 1997-09-06 | 1998-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-07 | 2001-09-06 | 2002-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-07 | 2005-09-06 | 2006-03-08 | $7700.00 | Window Closed / Lapsed |