| 摘要 |
PURPOSE:To provide a path for light to pass which attains high accuracy in positioning by a method wherein there are a light passing part parallel to a chip surface of an optical chip or which is curved-surface and can condense light and an inclined plane which inclines forward regarding the chip surface by a specified angle, which is adjacent to the light passing part or is adjacent with a level difference to that, formed on front surface of a translucent resin body. CONSTITUTION:When inclined parts 32, 33 have an angle 30-60 regarding chips 21, 25, light projected from the light emitting chip 21 goes inside a translucent resin 28. Among this light, the light reaching the light passing part 30 on light emitting side comes out from the translucent resin 28 onto a path T of an object to be detected in the air. Also, the light reaching the inclined part 32 are wholly reflected by refractive index of the air and the light-penetrative resin 28, so that the light does not come out from the translucent resin 28 onto the path T of the object for detection. Accordingly, on the path T of the object for detection, a path of light from the light passing part 30 on light emitting side toward the light passing part 31 on light accepting side is formed. When the detection object interrupts the light on the path, the output of the light receiving chip 25 changes. |
