Patent ID: 8279440

Claim:
A hand-held light measuring device comprising: a. a device housing with a bottom face incorporating a measuring window through which a measurement optical path extends so that a measurement object can be measured when the device housing is positioned with its bottom face on the measurement object, and b. an integrated, displaceably mounted white reference tile which can be moved into the measurement optical path and moved back out of it again, wherein the white reference tile is disposed in an end region of an oblong support plate on its side directed towards the housing interior, which support plate is mounted so that it can be moved backwards and forwards between a parked position and an operating position, wherein the support plate terminates the device housing at its bottom face and is recessed into the device housing in the parked position, and wherein the support plate is adapted to be lifted out of the bottom face of the device housing and moved in the longitudinal direction so as to cover the measuring window with the end region incorporating the white reference tile in the operating position.