Photometer
OwnerYukitroy Williams, Yutaka Kadowakiinventors
Life of this patent
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Abstract
A photometer includes a luminous flux splitter that splits a luminous flux incident from a single light receiving optical system and guides the luminous flux to a finder optical system and a photometric part. A light receiver is arranged at a position to receive at least a part of light split into the finder optical system by the luminous flux splitter and generates an output for light emission profile analysis according to a light reception result.
Claims15
A photometer comprising a luminous flux splitter that splits a luminous flux incident from a single light receiving optical system and guides the luminous flux to a finder optical system and a photometric part, the photometer comprising:
- a light receiver that is arranged at a position to receive at least a part of light split into the finder optical system by the luminous flux splitter and generates an output for light emission profile analysis according to a light reception result,
- wherein:
- the light receiver is arranged at a position to receive at least a part of the light that is split into the finder optical system by the luminous flux splitter and reaches a finder eyepiece, and
- a shutter blocks reverse incident light from the finder eyepiece at a time of light reception by the light receiver.
A photometer comprising a luminous flux splitter that splits a luminous flux incident from a single light receiving optical system and guides the luminous flux to a finder optical system and a photometric part, the photometer comprising:
- a light receiver that is arranged at a position to receive at least a part of light split into the finder optical system by the luminous flux splitter and generates an output for light emission profile analysis according to a light reception result;
- a light guide mirror that is movable between a reflection/blocking position and a standby position, the reflection/blocking position being for reflecting at least a part of the light that is split into the finder optical system by the luminous flux splitter and reaches a finder eyepiece and for blocking reverse incident light from the finder eyepiece;
- and
- a mover that moves the light guide mirror from the standby position to the reflection/blocking position at a time of light reception by the light receiver,
- wherein the light receiver is arranged at a position to receive at least a part of light reflected by the light guide mirror moved to the reflection/blocking position.
A photometer comprising a luminous flux splitter that splits a luminous flux incident from a single light receiving optical system and guides the luminous flux to a finder optical system and a photometric part, the photometer comprising:
- a light receiver that is arranged at a position to receive at least a part of light split into the finder optical system by the luminous flux splitter and generates an output for light emission profile analysis according to a light reception result;
- and
- a half mirror that transmits a part of the light split into the finder optical system by the luminous flux splitter and reflects remaining light to a finder eyepiece,
- wherein:
- the light receiver is arranged at a position to receive at least a part of light transmitted by the half mirror, and
- the luminous flux splitter is an aperture mirror having an aperture at a center.
A photometer comprising a luminous flux splitter that splits a luminous flux incident from a single light receiving optical system and guides the luminous flux to a finder optical system and a photometric part, the photometer comprising:
- a light receiver that is arranged at a position to receive at least a part of light split into the finder optical system by the luminous flux splitter and generates an output for light emission profile analysis according to a light reception result;
- and
- an electronic viewfinder that receives the light split into the finder optical system by the luminous flux splitter,
- wherein:
- the light receiver is configured with the electronic viewfinder, and
- the luminous flux splitter is an aperture mirror having an aperture at a center.
Dependencies are inferred from the claim text.