| 摘要 |
A process for producing optical elements comprises the steps of (a) causing a porous transparent base material to hold a photo-decomposable compound which will be decomposed by light irradiation and can make a change in an optical property of the base material in response to the concentration of the photolysis product or compound originated therefrom, and (b) irradiating the resulting base material with rays of light, thereby decomposing the compound in proportion to the exposure quantity decreasing in the light transmission direction, to form a distribution of the concentration of the photolysis product or compound originated therefrom changing in that direction, in the base material.
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