Projecting device

Claim 2

A projecting device, comprising: plural element lens systems, each system composed of at least one bar lens adapted for imaging a part of the object as a part of a corresponding projected image, each bar lens having an axial length larger than its effective diameter; wherein said plural element lens systems, when viewed from one end, are arranged in at least two rows and in a staggered fashion with one row displaced relative to the adjacent row by a distance equal to half the pitch of the adjacent row; two grooved blocks in face to face relation for arranging said plural element lens systems with the grooves of said blocks defining two rows which extend in a particular direction perpendicular to the optical axes of said systems; and an opaque elastomer material filled in the space between the rows of said element lens systems for preventing light from entering into the space and for permitting fine adjustment of the grooved blocks.

Claim 3

A projecting device according to claim 1, wherein each lens system includes first and second bar lenses arranged along a common optical axis and further comprising an intermediate ring provided between said first and second bar lenses in each lens system for guiding an effective light beam within the effective diameter of the associated first and second bar lenses, the internal diameter of each intermediate ring being selected so as to be equal to or slightly greater than the effective diameter of its associated first and second bar lenses.

Claim 4

A projecting device according to claim 2, wherein each row is displaced with respect to an adjacent row by a distance equal to half of the pitch of the adjacent row.

Claim 5

A projecting device according to claim 2, wherein the first bar lens satisfies at the entrance side the following conditions: ##EQU27## in which; r 1 is the radius of curvature of the first face of the first bar lens; r 2 is the radius of curvature of the second face thereof; d 1 ' is the axial thickness between the first and second faces thereof; φ 1 is the effective diameter thereof; φ 0 is the size of the object; n 1 ' is the refractive index of the material of the first bar lens for the design wavelength; β 1 is the lateral magnification of the first bar lens; S 1 is the axial distance from the first face of the first bar lens to the object; S 2 is the axial distance from the second face of the first bar lens to an intermediate image formed between the first bar lens and the second bar lens at the exit side plane; Fe is the effective F-number at the object side; K 1 is 0.9; and K 2 is 1.1; and wherein the second bar lens satisfies the following conditions: ##EQU28## in which: r 3 is the radius of curvature of the first face of the second bar lens; r 4 is the radius of curvature of the second face thereof; d 2 ' is the axial thickness between the first and second faces thereof; φ 3 is the effective diameter thereof; φ 4 is the size of the projected image; n 2 ' is the refractive index of the material of the second bar lens for the design wavelength; β 2 is the lateral magnification of the second bar lens; S 3 is the axial distance from the first face of the second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of the 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 6

A projecting device according to claim 4, wherein 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 7

A projecting device according to claim 2, wherein the first bar lens satisfies at the entrance side the following conditions: ##EQU29## in which: r 1 is the radius of curvature of the first face of the first bar lens; r 2 is the radius of curvature of the second face thereof; d 1 ' is the axial thickness between the first and second faces thereof; φ 1 is the effective diameter thereof; φ 0 is the size of the object; n 1 ' is the refractive index of the material of the first bar lens for the design wavelength; β 1 is the lateral magnification of the first bar lens; S 1 is the axial distance from the first face of the first bar lens to the object; S 2 ' is the axial distance from the second face of the first bar lens to the intermediate image plane; Fe is the effective F-number of the object side; K 1 is 0.9; and K 2 is 1.1; and wherein the second bar lens at the exit side satisfies the following conditions: ##EQU30## in which: r 3 is the radius of curvature of the first face of the second bar lens; r 4 is the radius of curvature of the second face of the second bar lens; d 2 ' is the axial thickness between the first and second faces of the second bar lens; φ 3 is the effective diameter thereof; φ 4 is the size of the projected image; n 2 ' is the refractive index of the material of the second bar lens for the design wavelength; β 2 is the lateral magnification of the second bar lens; S 3 is the axial distance from the first face of the second bar lens to the intermediate image plane; S 4 ' is the axial distance from the second face of the second bar lens to the projection plane; and Fe' is the effective F-number at the image field side.

Claim 8

A projecting device according to claim 6, wherein 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.