US4350431A
Expired / Lapsed
US
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Projecting device
Assignee: Canon Inc
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Filing: 1980-07-08
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Granted: 1982-09-21
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Expires: 2000-07-08
Abstract
Abstract A projecting device having an array, in a plane perpendicular to the optical axis, of plural element lens systems each axially provided with two bar lenses of an axial length larger than the effective diameter thereof, characterized by the presence of an intermediate ring positioned between two bar lenses for extracting the effective beam emerging from the first bar lens and entering the second bar lens and providing a determined light intensity distribution on the projection plane.
Inventors
- 👤 Noritaka Mochizuki
- 👤 Setsuo Minami
- 👤 Yoshiya Matsui
- 👤 Atsuo Tsunoda
- 👤 Koyo Midorikawa
- 👤 Hidetoshi Murase
- 👤 Mikio Suzuta
- 👤 Masazumi Moriwaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:13
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/0006; G02B3/0037; G02B3/0062; G02B27/00; G02B27/18; G02B3/0075; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G02B27/0018; G02B3/0056; G02B3/0087
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
441 words
A projecting device, comprising: a plurality of element lens systems each adapted for imaging a part of an object as part of a corresponding projected image and each comprising two bar lenses having axial lengths larger than the effective diameter thereof; a light absorbing portion provided on the external periphery of each bar lens and adapted for limiting light rays exceeding the effective diameter thereof; an intermediate ring provided between said two bar lenses in each element lens system for extracting the effective light beam; and support members for arranging said plural element lens systems along grooves provided in said support member to form an array of said systems; wherein a first of said bar lenses satisfies the following conditions: ##EQU18## wherein: r 1 is the radius of curvature of the first face of said first bar lens; r 2 is the radius of curvatuve of the second face thereof; d 1 ' is the axial lens thickness between the first and second faces of said first bar lens; φ 1 is the effective diameter thereof; φ 0 is the dimension of the object; n 1 ' is the refractive index of the material of said first bar lens for the design wavelength; β 1 is the lateral magnification of said first bar lens; S 1 is the axial distance from the first face of said first bar lens to the object plane; S 2 ' is the axial distance from the second face of said first bar lens to the intermediate image plane; Fe is the effective F-number at the object field side; K 1 is 0.9 and K 2 is 1.1; and wherein the second bar lens satisfies the following conditions: ##EQU19## wherein: r 3 is the radius of curvature of the first face of said second bar lens; r 4 is the radius of curvature of the second face thereof; d 2 ' is the axial lens thickness between the first and second faces of said second bar lens; φ 3 is the effective diameter of said second bar lens; φ 4 is the dimension of the projected image; n 2 ' is the refractive index of the material of said second bar lens for the design wavelength; β 2 is the lateral magnification of said second bar lens; S 2 is the axial distance from the first face of said second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of said second bar lens to the projection plane; Fe' is the effective F-number at the image field side; K 1 is 0.9, and K 2 is 1.1
Claim 2
Dependent Claim
441 words
A projecting device, comprising: a plurality of element lens systems each adapted for imaging a part of an object as part of a corresponding projected image and each comprising two bar lenses having axial lengths larger than the effective diameter thereof; a light absorbing portion provided on the external periphery of each bar lens and adapted for limiting light rays exceeding the effective diameter thereof; an intermediate ring provided between said two bar lenses in each element lens system for extracting the effective light beam; and support members for arranging said plural element lens systems along grooves provided in said support member to form an array of said systems; wherein a first of said bar lenses satisfies the following conditions: ##EQU18## wherein: r 1 is the radius of curvature of the first face of said first bar lens; r 2 is the radius of curvatuve of the second face thereof; d 1 ' is the axial lens thickness between the first and second faces of said first bar lens; φ 1 is the effective diameter thereof; φ 0 is the dimension of the object; n 1 ' is the refractive index of the material of said first bar lens for the design wavelength; β 1 is the lateral magnification of said first bar lens; S 1 is the axial distance from the first face of said first bar lens to the object plane; S 2 ' is the axial distance from the second face of said first bar lens to the intermediate image plane; Fe is the effective F-number at the object field side; K 1 is 0.9 and K 2 is 1.1; and wherein the second bar lens satisfies the following conditions: ##EQU19## wherein: r 3 is the radius of curvature of the first face of said second bar lens; r 4 is the radius of curvature of the second face thereof; d 2 ' is the axial lens thickness between the first and second faces of said second bar lens; φ 3 is the effective diameter of said second bar lens; φ 4 is the dimension of the projected image; n 2 ' is the refractive index of the material of said second bar lens for the design wavelength; β 2 is the lateral magnification of said second bar lens; S 2 is the axial distance from the first face of said second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of said second bar lens to the projection plane; Fe' is the effective F-number at the image field side; K 1 is 0.9, and K 2 is 1.1
Claim 3
Dependent Claim
58 words
A projecting device according to the claim 1, further satisfying the conditions r 3 =-r 2 , r 4 =-r 1 , d 2 '=d 1 ', n 2 '=n 1 ', φ 3 =φ 1 , φ 4 =φ 0 , β 2 =1/β 1 , S 3 =-S 2 ', S 4 '=-S 1 and Fe'=Fe.
Claim 4
Dependent Claim
434 words
A projecting device, comprising: a plurality of element lens systems each adapted for imaging a part of an object as part of a corresponding projected image and each comprising two bar lenses having axial lengths larger than the effective diameter thereof; a light absorbing portion provided on the external periphery of each bar lens and adapted for limiting light rays exceeding the effective diameter thereof; an intermediate ring provided between said two bar lenses in each element lens system for extracting the effective light beam; and support members for arranging said plural element lens systems along grooves provided in said support member to form an array of said systems; wherein a first of said bar lenses satifies the following conditions: ##EQU20## wherein: r 1 is the radius of curvature of the first face of said first bar lens; r 2 is the radius of curvature of the second face thereof; d 1 ' is the axial lens thickness between the first and second faces of said first bar lens; φ 1 is the effective diameter thereof; φ 0 is the dimension of the object; n 1 ' is the refractive index of the material of said first bar lens for the design wavelength; β 1 is the lateral magnification of said first bar lens; S 1 is the axial distance from the first face of said first bar lens to the object plane; S 2 ' is the axial distance from the second face of said first bar lens to the intermediate image plane; Fe is the effective F-number at the object field side; and K 1 is 0.9 and K 2 is 1.1; and wherein said second bar lens satisfies the following conditions; ##EQU21## wherein: r 3 is the radius of curvature of the first face of said second bar lens; r 4 is the radius of curvature of the second face thereof; d 2 ' is the axial lens thickness between the first and second faces of said second bar lens; φ 3 is the effective diameter of said second bar lens; φ 4 is the dimension of the projected image; n 2 ' is the refractive index of the material of said second bar lens for the design wavelength; β 2 is the lateral magnification of said second bar lens; S 3 is the axial distance from the first face of said second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of said second bar lens to the projection plane; and Fe' is the effective F-number at the image field side.
Claim 5
Dependent Claim
434 words
A projecting device, comprising: a plurality of element lens systems each adapted for imaging a part of an object as part of a corresponding projected image and each comprising two bar lenses having axial lengths larger than the effective diameter thereof; a light absorbing portion provided on the external periphery of each bar lens and adapted for limiting light rays exceeding the effective diameter thereof; an intermediate ring provided between said two bar lenses in each element lens system for extracting the effective light beam; and support members for arranging said plural element lens systems along grooves provided in said support member to form an array of said systems; wherein a first of said bar lenses satifies the following conditions: ##EQU20## wherein: r 1 is the radius of curvature of the first face of said first bar lens; r 2 is the radius of curvature of the second face thereof; d 1 ' is the axial lens thickness between the first and second faces of said first bar lens; φ 1 is the effective diameter thereof; φ 0 is the dimension of the object; n 1 ' is the refractive index of the material of said first bar lens for the design wavelength; β 1 is the lateral magnification of said first bar lens; S 1 is the axial distance from the first face of said first bar lens to the object plane; S 2 ' is the axial distance from the second face of said first bar lens to the intermediate image plane; Fe is the effective F-number at the object field side; and K 1 is 0.9 and K 2 is 1.1; and wherein said second bar lens satisfies the following conditions; ##EQU21## wherein: r 3 is the radius of curvature of the first face of said second bar lens; r 4 is the radius of curvature of the second face thereof; d 2 ' is the axial lens thickness between the first and second faces of said second bar lens; φ 3 is the effective diameter of said second bar lens; φ 4 is the dimension of the projected image; n 2 ' is the refractive index of the material of said second bar lens for the design wavelength; β 2 is the lateral magnification of said second bar lens; S 3 is the axial distance from the first face of said second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of said second bar lens to the projection plane; and Fe' is the effective F-number at the image field side.
Claim 6
Dependent Claim
59 words
A projecting device according to the claim 3, further satisfying the following conditions: r 3 =-r 2 , r 4 =-r 1 , d 2 '=d 1 ', n 2 '=n 1 ', φ 3 =φ 1 , φ 4 =φ 0 , β 2 =1/β 1 , S 3 =-S 2 ', S 4 '=-S 1 , Fe'=Fe.
Claim 7
Dependent Claim
52 words
A projecting device according to claim 1, wherein said element lens systems are arranged, when viewed from the entrance ends thereof, in two rows and in a staggered fashion in which each row is displaced with respect to the other row by a distance equal to half the pitch of said systems.
Claim 8
Dependent Claim
18 words
A projecting device according to claim 1, wherein said support member is a grooved block having U-sectioned grooves.
Claim 9
Dependent Claim
18 words
A projecting device according to claim 1, wherein said support member is a grooved block having V-sectioned grooves.
Claim 10
Dependent Claim
52 words
A projecting device according to claim 3, wherein said element lens systems are arranged, when viewed from the entrance ends thereof, in two rows and in a staggered fashion in which each row is displaced with respect to the other row by a distance equal to half the pitch of said systems.
Claim 11
Dependent Claim
371 words
A projecting device, comprising: a plurality of element lens systems each adapted for imaging a part of an object as part of a corresponding projected image and each comprising two bar lenses having axial lengths larger than the effective diameter thereof; a light absorbing portion provided on the external periphery of each bar lens and adapted for limiting light rays exceeding the effective diameter thereof; an intermediate ring provided between said two bar lenses in each element lens system for extracting the effective light beam; and support members for arranging said plural element lens systems along grooves provided in said support member to form an array of said systems; wherein a first of said bar lenses satisfies the following conditions: ##EQU22## wherein: r 1 is the radius of curvature of the first face of said first bar lens; r 2 is the radius of curvature of the second face thereof; d 1 ' is the axial lens thickness between the first and second faces of said first bar lens; φ 1 is the effective diameter thereof; φ 0 is the dimension of the object; n 1 ' is the refractive index of the material of said first bar lens for the design wavelength; β 1 is the lateral magnification of said first bar lens; S 1 is the axial distance from the first face of said first bar lens to the object plane; S 2 ' is the axial distance from the second face of said first bar lens to the intermediate image plane; Fe is the effective F-number at the object field side; K 1 is 0.9 and K 2 is 1.1; and wherein the second bar lens satisfies the following conditions: ##EQU23## wherein: r 3 is the radius of curvature of the first face of said second bar lens; r 4 is the radius of curvature of the second face thereof; d 2 ' is the axial lens thickness between the first and second faces of said second bar lens; φ 3 is the effective diameter of said second bar lens; φ 4 is the dimension of the projected image; n 2 ' is the refractive index of the material of said second bar lens for the design wavelength;
Claim 12
Dependent Claim
371 words
A projecting device, comprising: a plurality of element lens systems each adapted for imaging a part of an object as part of a corresponding projected image and each comprising two bar lenses having axial lengths larger than the effective diameter thereof; a light absorbing portion provided on the external periphery of each bar lens and adapted for limiting light rays exceeding the effective diameter thereof; an intermediate ring provided between said two bar lenses in each element lens system for extracting the effective light beam; and support members for arranging said plural element lens systems along grooves provided in said support member to form an array of said systems; wherein a first of said bar lenses satisfies the following conditions: ##EQU22## wherein: r 1 is the radius of curvature of the first face of said first bar lens; r 2 is the radius of curvature of the second face thereof; d 1 ' is the axial lens thickness between the first and second faces of said first bar lens; φ 1 is the effective diameter thereof; φ 0 is the dimension of the object; n 1 ' is the refractive index of the material of said first bar lens for the design wavelength; β 1 is the lateral magnification of said first bar lens; S 1 is the axial distance from the first face of said first bar lens to the object plane; S 2 ' is the axial distance from the second face of said first bar lens to the intermediate image plane; Fe is the effective F-number at the object field side; K 1 is 0.9 and K 2 is 1.1; and wherein the second bar lens satisfies the following conditions: ##EQU23## wherein: r 3 is the radius of curvature of the first face of said second bar lens; r 4 is the radius of curvature of the second face thereof; d 2 ' is the axial lens thickness between the first and second faces of said second bar lens; φ 3 is the effective diameter of said second bar lens; φ 4 is the dimension of the projected image; n 2 ' is the refractive index of the material of said second bar lens for the design wavelength;
Claim 13
Dependent Claim
70 words
β 2 is the lateral magnification of said second bar lens; S 2 is the axial distance from the first face of said second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of said second bar lens to the projection plane; Fe' is the effective F-number at the image field side; K 1 is 0.9, and K 2 is 1.1.
Claim 14
Dependent Claim
70 words
β 2 is the lateral magnification of said second bar lens; S 2 is the axial distance from the first face of said second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of said second bar lens to the projection plane; Fe' is the effective F-number at the image field side; K 1 is 0.9, and K 2 is 1.1.
Claim 15
Dependent Claim
18 words
A projecting device according to claim 3, wherein said support member is a grooved block having V-sectioned grooves.
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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |