摘要:
A phase correction plate is mounted on an imaging lens. The phase correction plate is structured in such a manner that the phase difference of light that has passed a middle region of the phase correction plate is lower than the phase difference of light that has passed a peripheral region of the phase correction plate, and that in the peripheral region, the phase difference of light that has passed through the phase correction plate increases from the middle-region side of the peripheral region toward the periphery side of the peripheral region.
摘要:
The spherical aberration of an imaging lens changes from an object side of image-plane base position Zo toward the other side thereof as a distance from optical axis Z1 increases, and formulas 0.02
摘要:
A backlight unit, comprising plural linear light sources, and an optical functional sheet, wherein a prism structure having plural prisms is formed on at least one surface of the optical functional sheet, and the values of (Hn−1+Hn)/(An−An−1) are approximately equivalent, wherein, in a brightness distribution graph that expresses a brightness distribution in the optical functional sheet, A1 is a peak site and H1 is a peak height of a first virtual image, A2 is a peak site and H2 is a peak height of a second virtual image adjacent to the first virtual image, . . . , An is a peak site and Hn is a peak height of (n)th virtual image adjacent to (n−1)th virtual image, and these virtual images are derived from the plural linear light sources.
摘要:
An image pickup apparatus according to one aspect of the invention includes: an imaging lens configured to perform a phase modulation function to extend a depth of field; a color image pickup element configured to convert an optical image which passes through the imaging lens and is formed on the image pickup element into an electric signal, the image pickup element having primary filters of three primary colors arranged for respective pixels in a predetermined pattern; and a restoration processing device configured to perform filtering processing using a single restoration filter on color signals corresponding to the primary filters of the three primary colors outputted from the color image pickup element, the restoration filter being an inverse function of a point spread function obtained when the phase modulation is performed by the imaging lens.