The integrating sphere is hollow and houses the at least one light source in it

The integrating sphere is an accessory of choice when studying reflectance properties of solids, analyzing light scattering and highly absorbing samples and collecting spectra difficult to obtain with standard sampling techniques. The integrating sphere is hollow and houses the at least one light source in it. An illumination device includes an integrating sphere and at least one light source. The present invention relates to an integrating sphere for measuring a light-emitting property of a light source, and more particularly, to an integrating sphere having a means for controlling temperature inside the integrating sphere. An integrating sphere for measuring an optical property of a light source according to the present invention has a substantially spherical hollow space formed therein. The light source can be manipulated between a first configuration and a second configuration. The illumination device emits a first spectrum of light when the light source is in the first configuration, and a second spectrum of light when the light source is in the second configuration.

A light source support, which has one end fixed to an inner peripheral surface so as to hermetically seal the first through-hole of the integrating sphere and the other end disposed at the center of the hollow space of the integrating sphere, is installed within the hollow space. A first through-hole provided such that temperature-controlled air is supplied into the hollow space of the integrating sphere there through; and a second through-hole provided such that a wire for supplying electric power to the light source installed inside the hollow space of the integrating sphere passes there through.

The integrating sphere includes an air supply tube fixed to an outer peripheral surface of the integrating sphere where the second through-hole is formed, so that air can be supplied to the interior of the integrating sphere through the second through-hole; a shielding plate installed to be spaced apart by a predetermined distance from the second through-hole; an air supply means for supplying air to the air supply tube; and a temperature control means for controlling the temperature of air passing through the air supply tube and being supplied from the air supply means.