| 摘要 |
PURPOSE:To enable to photograph an image of a subject little influenced by shadow by providing an annular light source for illuminating the subject that makes the optical axis of an optical system a center in the case. CONSTITUTION:An annular transparent heat resisting glass for protecting an illuminating lamp 19 is fitted between the front end of the case 11 and the front end of a holding member 15 and fixed by annular fitting frames 25 and 26 inserted to the holding member 15 and the case 11. An annular illuminating lamp that makes the optic axis of a lens a center is provided around the holding member. As a product which is at the position of inspection on the optic axis is irradiated by the annular illuminating lamp, the product and surrounding are illuminated almost uniformly, and the shade of the product is hardly formed.
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