Patent ID: 6466312
Filing Date: 2002-10-15
Classification: G01J

Abstract:
An illuminance sensing head structure, comprising a housing, a light detector, a positioning member, a first color light filtering plate, a second color light filtering plate, and a diffusion plate;wherein, the housing is integrally formed by black opaque plastic material, and has a top face recessed with a square plate receiving slot for receiving the first color light filtering plate and the second color light filtering plate, the plate receiving slot has a center recessed with a rectangular receiving chamber which is formed with an oblique side, for receiving the light detector which has an oblique side, one side of the plate receiving slot has a mediate section formed with a member receiving space, for receiving the positioning member; wherein, the plate receiving slot of the housing has an outer edge provided with multiple rod insertion holes; the diffusion plate is a plate having a high diffusivity, and has an enclosure, the diffusion plate has a bottom formed with multiple insertion rods each inserted and secured into the rod insertion hole of the housing, each insertion rod has a rod diameter close fit in the hole diameter of each rod insertion hole.