| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical product, though having a light-shielding property, having a favorable external appearance and providing a clear field of vision, and to provide light-shielding spectacles using the same. <P>SOLUTION: An optical product 1 according to the present invention includes a volume phase hologram formed by applying laser beams L1 and L2 for hologram recording, while inclined to a hologram surface H (a surface of a base material 2). A wavelength λ of reflected light beams R1, R2, and the like generated by reflecting incident light to the hologram surface H is changed according to an incident angle of the incident light to the hologram surface H. The waveform λ of the reflected light R1 at the incident angle 20° in the optical product 1 is 488 nm, and the wavelength λ of the reflected light R2 at the incident angle of 90° is 380 nm. <P>COPYRIGHT: (C)2012,JPO&INPIT |
