| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical power measuring apparatus and a method for finely segmenting a safety class of a radiation from a light source based on a difference between light collection properties at a retina of a human i.e. the magnitude of a field of view dependent on a single light source, an array light source and a wavelength distribution, and achieving an efficient utilization of the optical energy by avoiding an overestimate of a risk as the safety of the human is maintained. SOLUTION: A measurement system has a collimating lens L<SB>c</SB>corresponding to a cornea as a structure of an eye of the human, an iris aperture AP corresponding a pupil, a focus lens LΦcorresponding to a lens of the human, and an optical sensor SEN corresponding to the retina. A focal length f<SB>c</SB>of the collimating lens is the minimum adjustment near point of 100 mm, and a limit aperture D<SB>a</SB>of the iris aperture is a diameter of 7 mm as the worst exposure state of a disability in the retina. COPYRIGHT: (C)2008,JPO&INPIT
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