摘要:
A passive optical power limiting window comprising a transparent optical input element, a transparent optical output element, and a power-limiting element disposed between these input and output elements for transmitting optical light from these input elements to these output elements, these optical power-limiting elements comprising an optical-limiting solid mixture containing particles of at least one material that produces reversible thermal changes in response to light above a predetermined optical power level, thereby changing the optical transmission properties of these power-limiting elements.
摘要:
Optical actuators are provided in a variety of formats. Optical actuators use temperature increases or light momentum to convert the impingement of light into movement. Optical actuators (16) are provided in forms such as: an optical cavity (3) that absorbs light to cause displacement of the actuator, an optical actuator micro-mirror (34) that uses light momentum to cause rotation of the mirror (34), and a bistable shell actuator that changes shape in response to the impingement of light thereon. Optical actuators may be thermally compensated and may be attached to lever systems to multiply their effective displacements.
摘要:
The present invention relates to optical power-limiting device, and more particularly, to an optical power-limiting passive device and to a method for limiting optical power transmission in lenses and windows, using absorption changes in a novel photochromic composition, having response to infrared light in addition to the conventional response to ultra violet light. This additional response is featuring the use of the novel photochromic composition in places where ultra violet and short wave visible light is absent, or obscured, e.g. using photochromic glasses behind the front window of a car.
摘要:
An active, transparency-controlled window comprises at least one layer of a material that is transparent to at least selected wavelengths of light; at least one layer of photochromic material having a transparency, to the at least selected wavelengths of light, that can be controllably altered by an activating light; and a controllable source of light that activates the photochromic material to controllably alter the transparency of the photochromic material to the at least selected wavelengths of light. The material that is transparent to at least selected wavelengths of light may be a material selected from the group consisting of glass and plastic.