| 摘要 |
PROBLEM TO BE SOLVED: To provide a reference light source device which can shorten the time necessary for calibration and can be used for development of a display device, such as, transmittance of illuminating light of a display part or the printing density of a display section.SOLUTION: In a filter part 13, an intermediate diffusion plate 16, having a recessed shape in front view is provided which is interposed between a first diffusion plate 14 and a second diffusion plate 15. In a state where the three plates overlap, a filter accommodating part 17 is formed which has a gap of a prescribed space of a dimension d2, and two of any filter members 18a, 18b, ..., 18d having different colors are accommodated, remaining being overlapped among a group of filters 18. Dimensions d4 and d5 in the direction of thickness of the two filter members are respectively set so as to be approximately half the dimension d2 (for instance, approximately d2=d4+d5, d4=d5). |
