STANDARD ILLUMINANT FOR MEASURING INTENSITY OF ILLUMINATION

摘要

A standard illuminant for measuring intensity of illumination is provided to control intensity of illumination by monitoring intensity of light that is emitted from a luminous element and by maintaining the intensity uniformly. A standard illuminant for measuring intensity of illumination comprises as follows. An integrating sphere(10) includes an emission unit(11) to collect and emit light irradiated from inside. A luminous element(20) is mounted inside the integrating sphere to emit light into the integrating sphere. A light receiving element(30) is mounted inside the integrating sphere to sense intensity of light that is emitted from the luminous element. In addition, a control device unit(40) is interposed between the luminous and light receiving elements to control intensity of light uniformly.