Patent US3767846A successfully refreshed from Google Patents.
US3767846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary illumination device for uniform illumination of a light receiving surface of the pick-up tube for color television
Assignee: Canon Inc
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Filing: 1970-12-16
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Granted: 1973-10-23
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Expires: 1990-12-16
Abstract
Abstract In the apparatus disclosed, a clad rod is positioned in front of the light receiving surface of a dichroic mirror system, which is in turn placed in front of the pick-up tube. The clad rod is composed of transparent material having a relatively high refractive index. It is clad with a thin transparent material having a relatively low refractive index. Part of the clad rod is provided with a light diffusing roughened surface. Light is directed toward one end of the clad rod by a light source.
Inventors
- 👤 M Okubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:26
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/10; H04N23/13; H04N23/16; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H04N23/56; H01J2229/00; H01J2229/89; H01J2229/8926
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
134 words
An auxiliary illuminating apparatus for a pick-up tube of a color television system, comprising a clad rod, dichroic mirror means having a light receiving surface and positioned in front of the pick-up tube, said clad rod being positioned in front of said light receiving surface of said dichroic mirror means, said clad rod being composed of transparent material having a first refractive index and clad with thin transparent material having a refractive index substantially lower than the first refractive index, a portion of said clad rod being provided with a light diffusing roughened surface, and a light source directing light toward one end of the clad rod, said clad rod being positioned parallel to the light receiving surface with the roughened surface being positioned to cause light to be directed toward said receiving surface.
Claim 2
Dependent Claim
134 words
An auxiliary illuminating apparatus for a pick-up tube of a color television system, comprising a clad rod, dichroic mirror means having a light receiving surface and positioned in front of the pick-up tube, said clad rod being positioned in front of said light receiving surface of said dichroic mirror means, said clad rod being composed of transparent material having a first refractive index and clad with thin transparent material having a refractive index substantially lower than the first refractive index, a portion of said clad rod being provided with a light diffusing roughened surface, and a light source directing light toward one end of the clad rod, said clad rod being positioned parallel to the light receiving surface with the roughened surface being positioned to cause light to be directed toward said receiving surface.
Claim 3
Dependent Claim
47 words
An apparatus as in claim 1, wherein a second clad rod corresponding to said first clad rod is positioned in front of the light receiving surface of said dichroic mirror means, and a second light source for directing light to an end of said second clad rod.
Claim 4
Dependent Claim
22 words
An apparatus as in claim 2, wherein said rods are positioned parallel to said light receiving surface of said dichroic mirror means.
Claim 5
Dependent Claim
22 words
An apparatus as in claim 1, wherein said roughened surface faces away from the light receiving surface of said dichroic mirror means.
Claim 6
Dependent Claim
36 words
An apparatus as in claim 1, wherein the portion of the clad rod within the thin transparent material is composed of one of the materials selected from the group consisting of glass and acrylic acid resin.
Claim 7
Dependent Claim
177 words
An auxiliary illuminating apparatus for a pick-up tube of a color television system, comprising dichroic mirror means having a light entry surface and positioned in front of the light receiving surface of said pick-up tube, elongated clad rod means positioned in front of the light entry surface of said dichroic mirror means, said clad rod means including a core rod composed of transparEnt material having a first refractive index, said clad rod means including a thin transparent cladding on said core rod, said cladding having a second refractive index substantially lower than the first refractive index, said rod means forming an elongated recess passing through said cladding and a portion of said core rod, said core rod and said cladding having roughened surfaces at said recess, and a light source positioned near the end of said clad rod means and directing light toward one end of the clad rod means, said clad rod means being positioned parallel to the light entry surface with the roughened recess being positioned to cause travel of light toward said entry surface.
Claim 8
Dependent Claim
177 words
An auxiliary illuminating apparatus for a pick-up tube of a color television system, comprising dichroic mirror means having a light entry surface and positioned in front of the light receiving surface of said pick-up tube, elongated clad rod means positioned in front of the light entry surface of said dichroic mirror means, said clad rod means including a core rod composed of transparEnt material having a first refractive index, said clad rod means including a thin transparent cladding on said core rod, said cladding having a second refractive index substantially lower than the first refractive index, said rod means forming an elongated recess passing through said cladding and a portion of said core rod, said core rod and said cladding having roughened surfaces at said recess, and a light source positioned near the end of said clad rod means and directing light toward one end of the clad rod means, said clad rod means being positioned parallel to the light entry surface with the roughened recess being positioned to cause travel of light toward said entry surface.
Claim 9
Dependent Claim
12 words
An apparatus as in claim 6, wherein said recess is comparatively elongated.
Claim 10
Dependent Claim
31 words
An apparatus as in claim 6, wherein said rod in said cladding is substantially cylindrical and said cladding covers substantially all the cylindrical surface of said rod except at said recess.
Claim 11
Dependent Claim
12 words
An apparatus as in claim 8, wherein said recess is comparatively elongated.
Claim 12
Dependent Claim
202 words
An auxiliary illuminating apparatus for uniformly illuminating the light receiving surface of a pick-up tube of a color television system, comprising dichroic mirror means having a light entry surface and positioned in front of the light receiving surface of said pick-up tube, elongated clad rod means positioned in front of the light entry surface of said dichroic mirror means, said clad rod means including a core rod composed of transparent material having a first refractive index, said clad rod means including a thin transparent cladding on said core rod, said cladding having a second refractive index substantially lower than the first refractive index, said rod means forming an elongated recess passing through said cladding and a portion of said core rod, said core rod and said cladding having roughened surfaces at said recess, and a light source positioned near the end of said clad rod means and directing light toward one end of the clad rod means, further comprising second clad rod means substantially identical to said first clad rod means and positioned in front of the light entry surface of said dichroic mirror means, and a second light source for directing light at the end of said second clad rod means.
Claim 13
Dependent Claim
202 words
An auxiliary illuminating apparatus for uniformly illuminating the light receiving surface of a pick-up tube of a color television system, comprising dichroic mirror means having a light entry surface and positioned in front of the light receiving surface of said pick-up tube, elongated clad rod means positioned in front of the light entry surface of said dichroic mirror means, said clad rod means including a core rod composed of transparent material having a first refractive index, said clad rod means including a thin transparent cladding on said core rod, said cladding having a second refractive index substantially lower than the first refractive index, said rod means forming an elongated recess passing through said cladding and a portion of said core rod, said core rod and said cladding having roughened surfaces at said recess, and a light source positioned near the end of said clad rod means and directing light toward one end of the clad rod means, further comprising second clad rod means substantially identical to said first clad rod means and positioned in front of the light entry surface of said dichroic mirror means, and a second light source for directing light at the end of said second clad rod means.
Claim 14
Dependent Claim
181 words
An auxiliary illuminating apparatus for uniformly illuminating the light receiving surface of a pick-up tube of a color television system, comprising dichroic mirror means having a light entry surface and positioned in front of the light receiving surface and said pick-up tube, elongated clad rod means positioned in front of the light entry surface of said dichroic mirror means, said clad rod means including a core rod composed of transparent material having a first refractive index, said clad rod means including a thin transparent cladding on said core rod, said cladding having a second refractive index substantially lower than the first refractive index, said rod means forming an elongated recess passing through said cladding and a portion of said core rod, said core rod and said cladding having roughened surfaces at said recess, and a light source positioned near the end of said clad rod means and directing light toward one end of the clad rod means, wherein said clad rod means are positioned parallel to the light entry surface with the roughened recess facing away from the light entry surface.
Claim 15
Dependent Claim
181 words
An auxiliary illuminating apparatus for uniformly illuminating the light receiving surface of a pick-up tube of a color television system, comprising dichroic mirror means having a light entry surface and positioned in front of the light receiving surface and said pick-up tube, elongated clad rod means positioned in front of the light entry surface of said dichroic mirror means, said clad rod means including a core rod composed of transparent material having a first refractive index, said clad rod means including a thin transparent cladding on said core rod, said cladding having a second refractive index substantially lower than the first refractive index, said rod means forming an elongated recess passing through said cladding and a portion of said core rod, said core rod and said cladding having roughened surfaces at said recess, and a light source positioned near the end of said clad rod means and directing light toward one end of the clad rod means, wherein said clad rod means are positioned parallel to the light entry surface with the roughened recess facing away from the light entry surface.
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |