Photometric device comprising a photo sensor mounted on a circuit board

A photometric device for measuring subject brightness in a lens-fitted photo film unit with a flash device that includes a circuit board having printed circuits on a print side and circuit elements on a mounting side that is opposite to the print side, the circuit board being mounted in the film unit with its print side oriented toward an object side of a taking lens of the film unit, the photometric device comprising:

• a light measuring circuit printed on the print side of the circuit board;
• an opening formed through the circuit board;
• a photo sensor having a photoreceptive surface on its front face, and a pair of terminals extending rearward from a rear end of the photo sensor, the photo sensor being mounted on the mounting side of the circuit board with its photoreceptive surface exposed through the opening to the print side, wherein the terminals are bent toward the circuit board and put through the circuit board from the mounting side to protrude tips of the terminals from the print side, and the tips of the terminals are soldered on the light measuring circuit;
• a photometric window formed through a front cover of the film unit, for exposing the photoreceptive surface of the photo sensor.

A photometric device comprising:

• a photo sensor having a photoreceptive surface;
• a photometric window formed in front of the photoreceptive surface;
• and
• a mask member provided between the photometric window and the photoreceptive surface, with a constant thickness in an axial direction perpendicular to the photoreceptive surface, the mask member having a plurality of smaller holes than the photoreceptive surface that are formed through from a front side that is exposed through the photometric window to a rear side that is opposed to the photoreceptive surface.

A photometric device for measuring subject brightness in a camera, comprising:

• a photo sensor having a photoreceptive surface that is oriented toward an object side of a taking lens of the camera and extends perpendicularly to an optical axis of the taking lens;
• a photometric window formed integrally with a front wall of the camera in front of the photoreceptive surface;
• and
• a mask member formed behind the photometric window integrally with the front wall, the mask member having a plurality of smaller holes than the photoreceptive surface that are formed through from a front side that is exposed through the photometric window to a rear side that is opposed to the photoreceptive surface, wherein the holes extend in the axial direction of the taking lens and have a diameter or a diagonal length that is less than an axial length of the holes.