Patent US5096280A successfully refreshed from Google Patents.
US5096280A
Expired / Lapsed
US
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Light source apparatus for separating white light into light components of a plurality of colors
Assignee: Sharp Corp
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Filing: 1990-06-25
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Granted: 1992-03-17
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Expires: 2010-06-25
Abstract
Abstract A light source apparatus for separating a white light into light components of a plurality of colors, includes a white light source and at least two dichroic mirrors. Each mirror selects a light with a particular wavelength band from a visible light so as to transmit the light with the selected wavelength band therethrough. The mirrors reflect light with a wavelength band other than the selected wavelength band so that the transmitted wavelength bands of the mirrors are different from each other. The mirrors are arranged opposite to each other with respect to the white light source. The apparatus also includes condenser lenses which are combined with each of the dichroic mirrors. The light reflected by each of the dichroic mirrors is returned to the white light source.
Inventors
- 👤 Hiroshi Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:20
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/1006; G02B27/102; G02B27/1046; G02B27/14; G02B27/149; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A light source apparatus for separating a white light into light components of a plurality of colors, comprising: a white light source for producing visible light; at least two dichroic mirrors, each dichroic mirror selecting light having a particular wavelength band from said visible light so as to transmit said light having said particular wavelength band therethrough, each dichroic mirror reflecting light components having particular wavelength bands that are different from said particular wavelength band transmitted therethrough so that each dichroic mirror transmits light having a different wavelength band therethrough, said dichroic mirrors being arranged opposite to each other with respect to said white light source; and condenser lenses, each condenser lens being combined with a dichroic mirror; said dichroic mirrors reflecting light components not transmitted therethrough towards said white light source.
Claim 2
Dependent Claim
132 words
A light source apparatus for separating a white light into light components of a plurality of colors, comprising: a white light source for producing visible light; at least two dichroic mirrors, each dichroic mirror selecting light having a particular wavelength band from said visible light so as to transmit said light having said particular wavelength band therethrough, each dichroic mirror reflecting light components having particular wavelength bands that are different from said particular wavelength band transmitted therethrough so that each dichroic mirror transmits light having a different wavelength band therethrough, said dichroic mirrors being arranged opposite to each other with respect to said white light source; and condenser lenses, each condenser lens being combined with a dichroic mirror; said dichroic mirrors reflecting light components not transmitted therethrough towards said white light source.
Claim 3
Dependent Claim
51 words
The light source apparatus as claimed in claim 1, wherein said dichroic mirrors are spherically formed; said condenser lenses being arranged so that a distance between each of said condenser lenses and said white light source is longer than a distance between a corresponding dichroic mirror and said white light source.
Claim 4
Dependent Claim
47 words
The light source apparatus as claimed in claim 1, wherein a surface of each of said condenser lenses is spherical on a side corresponding to said white light source and each of said dichroic mirrors being formed on the spherical surface of each of said condenser lenses.
Claim 5
Dependent Claim
71 words
The light source apparatus as claimed in claim 1, wherein each of said dichroic mirrors is arranged so that a distance between each of said dichroic mirrors and said white light source is longer than a distance between a corresponding condenser lens and said white light source, each of said dichroic mirrors being flatly formed and having a plane surface perpendicular to an optical axis of each of said condenser lenses.
References Cited (Backward Citations)
US2971051A
Cited
US3537789A
Cited
US4003634A
Cited
JPS60179723A
Cited
JPS6199118A
Cited
JPH02115889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |