Abstract: This invention discloses an optical system which comprises first positioning and connecting portions which are formed by an integral molding on left and right side surfaces of an incidence surface of a second prism while having steps above an incidence surface and includes small bolt holes and positioning pins and second positioning and connecting portions which are formed by an integral molding at both left and right sides of a projection surface of the first prism such that they extend from the both left and right sides from the projection surface and includes small bolt holes and small bolt fitting holes, wherein the positioning pins are fitted into the positioning pin fitting holes and the lower surfaces of the second positioning and connecting portions are brought into contact with the upper surfaces of the first positioning and connecting portions, and thereafter, small bolts are made to pass through and are threaded into the small bolt holes thus integrally connecting the first prism and the second pri

Abstract: A condenser of solar energy on a moving structure, with east-west solar tracking and a modular liquid lens, the former consisting of a system capable of concentrating the solar energy by the incorporation of one or several modular liquid lenses, and the latter comprised by the connection of different transparent lenticular recipients, capacitated for installation on a metallic structure of spherical or cylindrical shape which, by means of the action of a divergent lens and a liquid prism transmits the heat to the fluid in a primary circuit which by means of a heat exchanger provides the temperature necessary for the different energy uses.

Abstract: In an image reading device in which an original is illuminated by a light source, and a reflected beam from the original is imaged on a sensor through a rod lens array, a light-shielding member is arranged between the beam exit surface of the light source and the incident surface of the rod lens array to prevent the beam from the light source from being directly incident on the rod lens array to cause a flare. An image reading device and information processing apparatus in which the image quality is rarely degraded by the flare beam are provided.

Abstract: Disclosed is a reading lens consisting of one glass lens and first and second plastic lenses. A positive diffraction lens structure being is formed on one surface of the surfaces of the first and second plastic lenses. The positive diffraction lens structure functions at least to compensate a longitudinal chromatic aberration which is caused by refractive power of the glass lens and the first and second plastic lenses.

Abstract: An optical system in which a coherent light beam is made more uniform in intensity in cross section. Two light shearing plates disposed at an angle to each other scramble the coherency of the light beam while homogenizing and expanding it. Each shearing plate has a partially reflecting element and a fully reflecting element. The resulting beam is of incoherent radiation having a high uniformity of illumination.

Abstract: A telescope eyepiece comprising a series of single-element lenses in a combination that cancels chromatism. A negative field lens produces chromatism that is partly cancelled by an intermediate positive lens. The resulting red and blue focal points behind the intermediate lens are exactly matched by the same focal points for parallel rays assumed to originate from behind the eye lens passing forward, thus creating an achromatic system that cancels the remaining chromatism. An additional one or two intermediate positive lenses may be added to increase the field of view and reduce the curvature of field. The eyepiece designer can set the distortion of the system to zero, or can adjust it in a range from minor pincushion to minor barrel distortion as desired. Spherical aberration is corrected by the selection of curves for the field lens. Astigmatism is corrected by the spacing of the field lens from the next intermediate lens.

Abstract: Microscope objective lenses are disclosed that comprise an axially movable second lens group for correcting aberrations that arise with changes in the thickness of a cover glass or other transparent body situated between the specimen and the objective lens. An objective lens according to one aspect of the invention comprises, in order from the specimen side, first, second, third, and fourth lens groups. The first lens group is positive and comprises a negative lens cemented to a positive lens, the positive lens having a convex surface facing the specimen side. The second lens group is positive and comprises a cemented lens having a cemented surface having negative refractive power. The third lens group is positive and causes a ray bundle from the specimen, propagating divergently from the specimen, to converge toward the optical axis. The fourth lens group is negative and comprises a positive lens cemented to a negative lens, the negative lens having a concave surface facing the image side.

Abstract: An objective lens comprising a positive-refractive power front-side lens group Lf having a junction meniscus lens or a meniscus single lens whose concave side faces the object and a rear-side lens group Lr placed behind said front-side lens group. In said front-side lens group, the refractive index nF and the Abbe's number .upsilon.F of the glass materials of the meniscus lens nearest the object and also the refractive index nR and the Abbe's number .upsilon.R of glass materials of convex lenses out of said rear-side lens group satisfy the following conditions:nF.ltoreq.1.50,.upsilon.F>65 (1)nR.ltoreq.1.65,35<.upsilon.

Abstract: A zoom lens system includes a positive first lens group, a negative second lens group, and a positive third lens group. The second and third lens groups move to perform a zooming operation. The zoom lens system satisfies the relationships 0<logZ.sub.2 /logZ<0.4; 0.25<d.sub.1-2 /f.sub.W <0.55; and 3<L.sub.2-3 /f.sub.W <4.6, wherein "Z.sub.2 " designates the ratio defined by the lateral magnification of the second lens group at the longest focal length extremity to the lateral magnification of the second lens group at the shortest focal length extremity, "Z" represents the ratio defined by the longest focal length of the entire zoom lens system to the shortest focal length of the entire zoom lens system, "f.sub.W " represents the shortest focal length of the entire zoom lens system, "d.sub.1-2 " represents the distance between the last lens surface of the first lens group and the first lens surface of the second lens group at the shortest focal length extremity, and "L.sub.

Abstract: The invention comprises a mounting assembly for an image intensifier tube in an optical sight. In accordance with one embodiment of the invention, a mounting assembly (152) may include a housing (154), a retainer (158) and a locking device (177). The housing (154) may be mounted to an optical bench (60). The retainer (158) may engage an image intensifier tube (150) and be coupled to the housing (154). The image intensifier tube (150) may be rotatable relative to the optical bench (60). The locking device (177) may selectively secure the image intensifier tube (150) relative to the optical bench (60).

Abstract: An objective lens system for a microscope has a high magnification and high numerical aperture. Corrections for various aberrations, and especially coma, can be made over a wide field of view. The system can be used as an objective lens system for a fluorescence microscope. The objective lens system contains a first lens group which has multiple lenses placed in sequence as counted from the object side. The first lens group has a positive focal power. A second lens group includes a first compound lens, prepared by cementing a negative meniscus lens with its convex surface facing the object side and a biconvex lens, and a second compound lens, prepared by cementing a biconcave lens and a biconvex lens. A third lens group has multiple lenses and a negative focal power. A change in aberration can be corrected for by moving the second lens group with respect to the first and third lens groups along the optical axis. The objective lens system meets certain prescribed conditions.