Abstract:
A display element includes a display substrate that comprises a liquid crystal; and a plurality of diffraction gratings having different diffraction modes, arranged in regions of the single display substrate that are different from one another.
Abstract:
The spectroscopic instrument includes a plurality of first lenses arranged one-dimensionally or two-dimensionally; an aperture opening provided near a focal plane of each of the plurality of first lenses; a spectroscopic unit that spectrally distribute the light that has passed through the aperture opening; and a light receiving unit that receives the light spectrally distributed by the spectroscopic unit. The image producing device includes: the spectroscopic instrument; an imaging unit that captures an image formed by an imaging optical system; and an image processing unit that acquires a lighting condition from a result of spectroscopy by the spectroscopic instrument and performs color conversion processing depending on the lighting condition on an image captured by the imaging unit.
Abstract:
A light detection device includes a lens array of a plurality of lenses arranged in the form of a honeycomb; and a photoelectric device array of a plurality of photoelectric devices for each of the plurality of lenses. The plurality of photoelectric devices is arranged under each of the plurality of lenses. Also disclosed are a focus detection device provided with the light detection device, and an imaging apparatus provided with the focus detection device as well as a method of producing such a light detection device and a method of detecting a focus.
Abstract:
A high-polymer optical low-pass filter is produced by cutting out of a high polymer material achieving optical anisotropy diagonally relative to an optic axis thereof.
Abstract:
A light detection device includes a lens array of a plurality of lenses arranged in the form of a honeycomb; and a photoelectric device array of a plurality of photoelectric devices for each of the plurality of lenses. The plurality of photoelectric devices is arranged under each of the plurality of lenses. Also disclosed are a focus detection device provided with the light detection device, and an imaging apparatus provided with the focus detection device as well as a method of producing such a light detection device and a method of detecting a focus.
Abstract:
Optical system for guiding subject light incident through a photo-taking lens 20 toward a finder 100 through a prism 90 is prepared and a plate-like diffractive element 50 is provided on the optical path. Light from an LED 70 to be turned on when a focusing state is achieved is introduced into the plate-like diffractive element 50 via a light guide member 60, and “auxiliary light indicating a focusing state” to travel upward in the drawing from the plate-like diffractive element 50 is generated and synthesized with the subject light. The auxiliary light shall have a linear polarization property. The subject image and the focusing state indication can be visually recognized on the finder 100. Part of the light toward the finder 100 is branched through a mirror 110 and then guided toward photometric unit 140. Auxiliary light separating unit 130 for excluding auxiliary light based on the difference in polarization property is provided in front of the photometric unit 140.
Abstract:
A camera comprises a spatial modulation optical filter that is disposed in a viewfinder optical system for subject observation at or near a position optically equivalent to an estimated image forming plane of a photographic optical system and modulates a subject light flux entering via the photographic optical system with transmission characteristics to obtain a light flux having a predetermined spatial frequency; a photoelectric conversion device that outputs a signal corresponding to detected light; an optical element that guides the subject light flux having been modulated at the spatial modulation optical filter to the photoelectric conversion device; and a focal adjustment state calculation means that calculates a focal adjustment state of the photographic optical system based upon the signal output from the photoelectric conversion device having received the modulated subject light flux.
Abstract:
First to third liquid crystal filters are arranged at first to third different distances from a predeterminate image formation surface. Light flux passing through the liquid crystal filters is received by a photodiode and converted into an electric signal. A variable-density stripe pattern of a predetermined space frequency is formed on the first liquid crystal filter while the second and the third liquid crystal filter are in the state of entire transparency and a first signal is output from the photodiode. Similarly, a variable-density stripe pattern is formed on the second liquid crystal filter while the first and the third liquid crystal filter are in the state of entire transparency and a second signal is output. Similarly, a variable-density stripe pattern is formed on the third liquid crystal filter while the first and the second liquid crystal filter are in the state of entire transparency and a third signal is output. According to the first, second, and third signals, a focal point position is calculated.
Abstract:
A camera comprises a spatial modulation optical filter that is disposed in a viewfinder optical system for subject observation at or near a position optically equivalent to an estimated image forming plane of a photographic optical system and modulates a subject light flux entering via the photographic optical system with transmission characteristics to obtain a light flux having a predetermined spatial frequency; a photoelectric conversion device that outputs a signal corresponding to detected light; an optical element that guides the subject light flux having been modulated at the spatial modulation optical filter to the photoelectric conversion device; and a focal adjustment state calculation means that calculates a focal adjustment state of the photographic optical system based upon the signal output from the photoelectric conversion device having received the modulated subject light flux.
Abstract:
First to third liquid crystal filters are arranged at first to third different distances from a predeterminate image formation surface. Light flux passing through the liquid crystal filters is received by a photodiode and converted into an electric signal. A variable-density stripe pattern of a predetermined space frequency is formed on the first liquid crystal filter while the second and the third liquid crystal filter are in the state of entire transparency and a first signal is output from the photodiode. Similarly, a variable-density stripe pattern is formed on the second liquid crystal filter while the first and the third liquid crystal filter are in the state of entire transparency and a second signal is output. Similarly, a variable-density stripe pattern is formed on the third liquid crystal filter while the first and the second liquid crystal filter are in the state of entire transparency and a third signal is output. According to the first, second, and third signals, a focal point position is calculated.