Optical modulator

About: Optical modulator is a research topic. Over the lifetime, 14068 publications have been published within this topic receiving 196932 citations.

Self-electro-optic device based on a superlattice asymmetric Fabry-Perot modulator with an on/off ratio >~ 100:1

Abstract: A self‐electro‐optic effect device based on a Fabry–Perot reflection modulator has been demonstrated for the first time. This modulator is a normally‐off high‐contrast asymmetric Fabry–Perot modulator using Wannier–Stark localization in a superlattice. Optical bistability has been achieved with a record‐high on/off ratio of 130:1 at the operating wavelength of 7620 A. The modulator with an appropriate reverse‐bias voltage supply was connected in series to a silicon photodiode which when illuminated with an appropriate light source acted as a current source load for the modulator.

Programmable binary phase-only optical device based on ferroelectric liquid crystal SLM

Abstract: The performance is reported of a programmable, two-level, phase-only device based on a commercially available 128 × 128 pixellated, ferroelectric liquid crystal spatial light modulator Near diffraction limited performance is achieved and results for a Dammann grating are comparable to those obtainable with fixed components

2-dimensional image display device, illumination light source and exposure illumination device

Abstract: A 2-dimensional beam scan unit (2) reflects emission beams from a red laser light source (1a), a green laser light source (1b), and a blue laser light source (1c) and scans in the 2-dimensional direction. Diffusion plates (3a, 3b, 3c) diffuses each of light beams scanned in the 2-dimensional direction to introduce them to the respective spatial light modulation elements (5a, 5b, 5c). The respective spatial light modulation elements (5a, 5b, 5c) modulate the respective lights according to the video signals of the respective colors. A dichroic prism (6) multiplexes the lights of the three colors after the modulation and introduce the multiplexed lights to a projection lens (7) so that a color image is displayed on a screen (8). Since the 2-dimensional light emitted from the beam scan unit is diffused to illuminate the spatial light modulation element, it is possible to change the optical axis of the beam emitted from the light diffusion member for irradiating the spatial light modulation element from time to time, there by effectively suppressing the speckle noise.

Optical modulator, display device and manufacturing method for same

Abstract: An optical modulator is provided which can be manufactured by means of a simple process, and a display device, and a method of manufacturing same. The optical modulator comprises a first substrate having a movable reflective film that oscillates in accordance with the application of an electrostatic force; a light-transmitting second substrate disposed so as to oppose the first substrate and formed with a transparent electrode for applying the electrostatic force, in a position corresponding to the movable reflective film; and a cavity section, demarcated by the first substrate and the second substrate, for restricting the range of oscillation of the movable reflective film. By forming a movable reflective film by a portion of the substrate and determining the range of oscillation of the movable reflective film by the interval between the substrates, an optical modulator of high durability and high precision can be obtained.