Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
200 words
A focusing device, for optical equipment of the type including a taking lens system, means providing two focusing light beams, and a view finder optical system, said focusing device comprising, in combination, a semitransparent focusing mirror positioned in the optical path of one focusing light beam; a totally reflecting focusing mirror positioned in the optical path of the other focusing light beam and operable to direct the other focusing light beam to said semitransparent mirror; means coupling one of said mirrors to the cylinder of the focusing lens of said taking lens system for angular displacement of said one mirror responsive to focusing adjustment of said focusing lens; a high-magnification image-forming focusing lens system positioned in the optical path of the focusing light beam rearwardly of said semitransparent mirror; an optical path switching reflector positioned rearwardly of said image-forming lens system; and means operable to move said switching reflector between a first position, in which it is positioned in the optical path of said view finder optical system during focusing of the optical equipment, and a second position in which said switching reflector is positioned outside the optical path of said view finder optical system, after focusing has been effected.
Claim 2
Dependent Claim
200 words
A focusing device, for optical equipment of the type including a taking lens system, means providing two focusing light beams, and a view finder optical system, said focusing device comprising, in combination, a semitransparent focusing mirror positioned in the optical path of one focusing light beam; a totally reflecting focusing mirror positioned in the optical path of the other focusing light beam and operable to direct the other focusing light beam to said semitransparent mirror; means coupling one of said mirrors to the cylinder of the focusing lens of said taking lens system for angular displacement of said one mirror responsive to focusing adjustment of said focusing lens; a high-magnification image-forming focusing lens system positioned in the optical path of the focusing light beam rearwardly of said semitransparent mirror; an optical path switching reflector positioned rearwardly of said image-forming lens system; and means operable to move said switching reflector between a first position, in which it is positioned in the optical path of said view finder optical system during focusing of the optical equipment, and a second position in which said switching reflector is positioned outside the optical path of said view finder optical system, after focusing has been effected.
Claim 3
Dependent Claim
31 words
A focusing device for optical equipment, as claimed in claim 1, in which said switching reflector, in both positions thereof, is disposed in the optical path of the focusing light beam.
Claim 4
Dependent Claim
21 words
A focusing device for optical equipment, as claimed in claim 1, including means biasing said switching reflector to said second position.
Claim 5
Dependent Claim
32 words
A focusing device for optical equipment, as claimed in claim 3, including manual means selectively operable to move said switching reflector to said first position during focusing of said taking lens system.
Claim 6
Dependent Claim
26 words
A focusing device for optical equipment, as claimed in claim 4, in which said manual means comprises a slide and a pushbutton to operate said slide.
Claim 7
Dependent Claim
31 words
A focusing device for optical equipment, as claimed in claim 4, in which said manual means effects linear displacement of said switching reflector from said second position to said first position.
Claim 8
Dependent Claim
31 words
A focusing device for optical equipment, as claimed in claim 4, in which said manual means effects angular displacement of said switching reflector from said second position to said first position.
Claim 9
Dependent Claim
42 words
A focusing device for optical equipment, as claimed in claim 4, in which said manual means comprises a lens hood mounted on said focusing lens cylinder for axial displacement therealong; and a slide extending between said lens hood and said switching reflector.
Claim 10
Dependent Claim
59 words
A focusing device for optical equipment, as claimed in claim 4, in which said optical equipment is a camera having a shutter-operating button; said shutter-operating button constituting said manual means and having a first operated position effecting movement of said switching reflector from said second position to said first position, and having a second operated position for picture taking.