Patent ID: 7787120

Claim:
A spectrophotometer comprising: a sample cell which stores a sample to be measured; a visible light source and an ultraviolet light source each for supplying an incident beam that enters the sample; a spectroscope which disperses a beam that has passed through the sample; an optical detector which detects beams dispersed from such beam; and a dichroic element which reflects or transmits ultraviolet beams from the ultraviolet light source and which transmits or reflects visible beams from the visible light source, wherein: optics are configured such that ultraviolet beams and visible beams that have passed through or have been reflected by the dichroic element enter the sample cell, the dichroic element has a first film formed over one of its surfaces and a second film formed over the other surface, the first film reflects ultraviolet beams incident on the element and transmits visible beams, and the second film transmits visible beams.