Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A phase difference detection type focus detection system for detecting focus condition of an objective lens of a camera with respect to an object within a focus detection area which spreads at a solid angle centering at the optical axis of said objective lens, comprising: a light projecting optical system for projecting a flux of light which crosses said focus detection area at a predetermined angle; a projective pattern arranged in said projecting optical system so as to be projected on said object as a projective image; and a plurality of transparent portions and opaque portions arranged alternatively at random pitches for forming said projective pattern.
Claim 2
Dependent Claim
106 words
A phase difference detection type focus detection system for detecting focus condition of an objective lens of a camera with respect to an object within a focus detection area which spreads at a solid angle centering at the optical axis of said objective lens, comprising: a light projecting optical system for projecting a flux of light which crosses said focus detection area at a predetermined angle; a projective pattern arranged in said projecting optical system so as to be projected on said object as a projective image; and a plurality of transparent portions and opaque portions arranged alternatively at random pitches for forming said projective pattern.
Claim 3
Dependent Claim
37 words
The focus detection system of claim 1, wherein width of said opaque portions are respectively different at each of the opaque portions and the repetition pitch of a pair of transparent portions and opaque portions is irregular.
Claim 4
Dependent Claim
20 words
The focus detection system of claim 2, wherein said objective lens is constituted as an interchangeable lens of said camera.
Claim 5
Dependent Claim
51 words
The focus detection system of claim 2, wherein said light projecting optical system includes: a light source for emitting light; a projecting lens for projecting said light forward as said flux of light; and wherein said projective pattern is arranged in a position between said light source and said projecting lens.
Claim 6
Dependent Claim
23 words
The focus detection system of claim 4, wherein said projective pattern is positioned substantially at the point of focus of said projecting lens.
Claim 7
Dependent Claim
116 words
An accessory for use with a camera having a phase difference detection type focus detection system for detecting focus condition of an objective lens of said camera with respect to an object within a focus detection area which spreads at a solid angle centering at the optical axis of said objective lens, said accessory comprising: a light projecting optical system for projecting a flux of light which crosses said focus detection area at a predetermined angle; a projective pattern arranged in said projecting optical system so as to be projected on said object as a projective image; and a plurality of transparent portions and opaque portions arranged alternatively at random pitches for forming said projective pattern.
Claim 8
Dependent Claim
116 words
An accessory for use with a camera having a phase difference detection type focus detection system for detecting focus condition of an objective lens of said camera with respect to an object within a focus detection area which spreads at a solid angle centering at the optical axis of said objective lens, said accessory comprising: a light projecting optical system for projecting a flux of light which crosses said focus detection area at a predetermined angle; a projective pattern arranged in said projecting optical system so as to be projected on said object as a projective image; and a plurality of transparent portions and opaque portions arranged alternatively at random pitches for forming said projective pattern.
Claim 9
Dependent Claim
36 words
The accessory of claim 6, wherein the width of said opaque portions are respectively different at each of the opaque portions and the repetition pitch of a pair of transparent portions and opaque portions is irregular.
Claim 10
Dependent Claim
18 words
The accessory of claim 7, wherein said objective lens is constituted as an interchangeable lens of said camera.
Claim 11
Dependent Claim
49 words
The accessory of claim 7, wherein said light projecting optical system includes: a light source for emitting light; a projecting lens for projecting said light forward as said flux of light; and wherein said projective pattern is arranged in a position between said light source and said projecting lens.
Claim 12
Dependent Claim
21 words
The accessory of claim 9, wherein said projective pattern is positioned substantially at the point of focus of said projecting lens.