PROBLEM TO BE SOLVED: To enable a decline in the luminous energy of a measurement beam used in spectrometry to be suppressed when spectrometry of a lens to be inspected that causes an axial chromatic aberration is performed in a spectral transmittance measurement device, making it possible to increase measurement accuracy.;SOLUTION: A spectral transmittance measurement device 100 is configured to comprise: a light source 1; a first optical system 2 forming a measurement beam L2; a lens support frame 5 for arranging a lens 3 to be inspected on the optical path of the measurement beam L2; a second optical system 4, including a chromatic aberration correction lens 4A to correct an axial chromatic aberration caused by the lens 3 to be inspected, for condensing a measurement beam L3 having passed through the lens 3 to be inspected; a diaphragm 8a arranged at the condensing position of a measurement beam L5; a spectrometer 8 for separating the measurement beam L5 having passed through the diaphragm 8a into spectral components and obtaining spectroscopic intensity data; and a movement stage 6 for moving the lens 3 to be inspected and the chromatic aberration correction lens 4A in a direction along a measurement beam axis O in order to adjust the condensing position of the measurement beam L5.;COPYRIGHT: (C)2015,JPO&INPIT
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