摘要:
A projecting optical device which simultaneously projects one object onto two or more different screens has a first screen, a second screen, a first projecting optical system which projects the object onto the first screen, and a second projecting optical system which projects the object onto the second screen and does not share an optical element with the first projecting optical system. A first base line connecting the center of the object to the center of the image projected on the first screen by the first optical system and a second base line connecting the center of the object to the center of the image projected on the second screen by the second optical system are not parallel to each other.
摘要:
An illumination optical system has a light source unit, a first array having a plurality of two-dimensionally arranged cells which deflect a incident light from the light source unit and a second array having a plurality of cells two-dimensionally arranged in a vicinity of a focal plane of the first array, wherein at least one of the first array and the second array is formed as a reflection array.
摘要:
An imaging optical system transmits a primary image. The optical system does not form an intermediate image. The primary image is projected on a screen as a secondary image. The optical system has a projection optical system and a reflection optical system. An optical axis of the reflection optical system forms an angle other than 90.degree. with respect to a screen-side image surface.
摘要:
An optical deflection device for deflecting light by a mirror mounted on the tip of a rod-like torsion spring which oscillates at near resonance frequency. An optical deflection device which produces a large amplitude by exerting control to avoid variation in the natural oscillation frequency of the torsion spring (including mirror) regardless of temperature fluctuation.
摘要:
An overhead projector provides an unobstructed view of projected images by minimizing the vertical dimension of the projector and provides sufficient brightness of projected images by minimizing the loss of light. The light emitted from a light source housed in the body of the projector is reflected by a first reflection mirror and directed, through a transparent stage on which a transparent original is placed, to a second reflection mirror. Meanwhile, on the transparent stage, the principal ray axis of the light beam forms an angle .theta. with respect to the center axis of the surface of the transparent original. After reaching the second reflection mirror and being reflected thereby, the light is condensed into a projection lens unit, and is projected therefrom onto a screen to form thereon an image of the transparent original.
摘要:
A probe which is inserted into a lumen of inside of a body, irradiates an observation object part of a physiological tissue with excitation light, and detects fluorescence resulting from the excitation light, wherein the probe including: a plus lens arranged facing toward a tip side of the probe; and a plurality of optical fibers receiving the fluorescence at tip surfaces through the plus lens, wherein the tip surface are directed toward the plus lens and arranged in positions offset from an optical axis of the plus lens, wherein positions of the tip surface of at least optical fibers of which an amount of offset from the optical axis of the plus lens differ mutually among plurality of optical fibers are shifted mutually along the optical axis of the plus lens.
摘要:
Provided is an optical characteristic measuring probe which can detect the position and the direction of the leading end of the probe without affecting a monitoring image. The bendable optical characteristic measuring probe is provided with a light guide body (71), which transmits light emitted from a light source and irradiates a subject to be measured with light, and a guide tube (70), which holds the light guide body (71) such that the light guide body freely rotates about the axis and is freely displaced in the axis direction. The light guide body (71) guides at least two types of light, i.e., measuring light for measuring the optical characteristics of the subject to be measured, and position determining light for measuring the position of the light guide body. On the side surface of the guide tube (70), a mark (M) having the characteristics of transmitting the measuring light and returning only the position determining light to the light guide body is provided.
摘要:
A probe which is inserted into a lumen of inside of a body, irradiates an observation object part of a physiological tissue with excitation light, and detects fluorescence resulting from the excitation light, wherein the probe including: a plus lens arranged facing toward a tip side of the probe; and a plurality of optical fibers receiving the fluorescence at tip surfaces through the plus lens, wherein the tip surface are directed toward the plus lens and arranged in positions offset from an optical axis of the plus lens, wherein positions of the tip surface of at least optical fibers of which an amount of offset from the optical axis of the plus lens differ mutually among plurality of optical fibers are shifted mutually along the optical axis of the plus lens.
摘要:
A variable-power optical system includes, in order from an object side thereof: a first lens group with a negative optical power; a second lens group with a positive optical power; a third lens group with a negative optical power; and a fourth lens group with a positive optical power. An interval between the first lens group and the second lens group decreases when a power of the variable-power optical system varies from a wide-angle end to a telephoto end. The second lens group includes at least one aspheric surface. The variable-power optical system satisfies the predetermined conditional expressions.
摘要:
A projector is loaded with a projection optical system unit having a refractive optical system, a curved mirror optical system, and a light travel change mirror optical system. Then, the projector has a first curved mirror and a second curved mirror of the curved mirror optical system arranged so that an optical path of a base ray reaching the first curved mirror and an optical path of a base ray leaving the second curved mirror do not intersect with each other, and also has the first curved mirror located between the second curved mirror and a screen surface. Furthermore, an angle of incidence of the base ray on the screen surface is within a predetermined range.