Photographic camera with an information indicating finder

Claim 2

A photographic camera with an information indicating finder comprising: a photographic lens having a front lens group having an optical axis; a reflecting surface behind said front lens group and inclined with respect to the optical axis; an observing optical system facing said reflecting surface and having an image surface, a focusing plate, a field lens, a data indicating means, a light source for illumination of said data indicating means, refracting means for refracting a light bundle, and an ocular; said focusing plate having a focusing plane coincident with said image surface, and said data indicating means being substantially coincident with said image surface; said refracting means being between said data indicating means and said light source for eliminating a reflection on a lens surface of said field lens; and said field lens being adjacent said focusing plane; a light-shielding means for shielding said light source, refracting means and said data indicating means from the scene light.

Claim 3

A photographic camera according to claim 1, wherein said refracting means is a prism, and a light bundle emanating from said light source passes through said prism to illuminate said data indicating means.

Claim 4

A photographic camera according to claim 1 in which a relay lens is provided between said field lens and said ocular.

Claim 5

A photographic camera with information indicating finder comprising: an afocal lens system having an axis; a basic lens focused for infinity and arranged on the optical axis of said afocal lens system; an image forming lens focused for infinity and disposed with its optical axis intersecting the optical axis of said afocal lens system at a point between said afocal lens system and said basic lens system; beam splitting means at the intersection for directing light from the axis of said afocal lens system to said image forming lens; reflecting means in the path of light from said beam splitting means in order to bend the optical path, said image forming lens defining an image surface; a focusing plate coincident with the image surface of said image forming lens; a field lens adjacent said focusing plate; a converging lens behind said field lens; an ocular behind said converging lens; a data indicating plate coincident with the image surface of said image forming lens; a light generating source for illuminating said indicating plate; and a prism arranged between said light source and said indicating plate to refract light from the source onto the plate; a light-shielding means for shielding said data indicating plate from the scene light.

Claim 6

A photographic camera with information indicating finder comprising: an afocal lens system having an axis; a basic lens focused for infinity and arranged on the optical axis of said afocal lens system; an image forming lens focused for infinity and disposed with its optical axis intersecting the optical axis of said afocal lens system at a point between said afocal lens system and said basic lens system; beam splitting means at the intersection for directing light from the axis of said afocal lens system to said image forming lens; reflecting means in the path of light from said beam splitting means in order to bend the optical path, said image forming lens defining an image surface; a focusing plate coincident with the image surface of said image forming lens; a field lens adjacent said focusing plate; a converging lens behind said field lens; an ocular behind said converging lens; a data indicating plate coincident with the image surface of said image forming lens; a light generating source for illuminating said indicating plate; and a prism arranged between said light source and said indicating plate to refract light from the source onto the plate; a light-shielding means for shielding said data indicating plate from the scene light.

Claim 7

A photographic camera with an information indicating finder comprising: an afocal lens portion; a basic lens behind said afocal lens portion and focused on infinity; a beam splitter positioned between said afocal lens portion and said basic lens; an objective lens facing said beam splitter; a reflecting means in the optical path; a focusing plate coincident with the image surface of said objective lens, a field lens adjacent said focusing plate; a relay lens behind said field lens; an ocular behind said relay lens; an information indicating means substantially coincident with the image surface of said objective lens; an electric-light converting means for illuminating said information indicating means; a light reflector facing said electric-light converting means to reflect light from electric-light converting means onto the information indicating means to eliminate the reflection on a lens surface of said field lens; a light-shielding means for shielding said electric-light converting means, said information indicating means and said light reflector from the scene light; and a masking means for masking direct light from said electric-light converting means to said information indicating means.

Claim 8

A photographic camera with an information indicating finder comprising: an afocal lens portion; a basic lens behind said afocal lens portion and focused on infinity; a beam splitter positioned between said afocal lens portion and said basic lens; an objective lens facing said beam splitter; a reflecting means in the optical path; a focusing plate coincident with the image surface of said objective lens, a field lens adjacent said focusing plate; a relay lens behind said field lens; an ocular behind said relay lens; an information indicating means substantially coincident with the image surface of said objective lens; an electric-light converting means for illuminating said information indicating means; a light reflector facing said electric-light converting means to reflect light from electric-light converting means onto the information indicating means to eliminate the reflection on a lens surface of said field lens; a light-shielding means for shielding said electric-light converting means, said information indicating means and said light reflector from the scene light; and a masking means for masking direct light from said electric-light converting means to said information indicating means.