Fuji Photo Optical Co., Ltd.

Fujinon Corporation

Pioneer Corporation

Hiroaki Fujita

Yasuhiko Sato

Katsunori Mukasa

Hiroshi Kobayashi

Hiroyasu Muto

Takashi Tanaka

Masashi Kawamoto

Hajime Yamanaka

Jun Shinkawa

Hideki Odachi

An optical system that includes a molded optical element having a non-uniform refractive index distribution due to molding and a method of manufacturing the optical system is disclosed. Data of the non-uniformity of the refractive index distribution associated with molding of the molded optical element is acquired and used in order to determine the form of an aspheric surface of the molded optical element for correcting aberrations caused by the non-uniformity of the refractive index distribution. This data may be acquired by measuring the refractive index distribution of an optical element molded based on initial design values that are based on assuming uniformity in the refractive index distribution of the molded optical element or it may be computed based on the form of the molded optical element. The optical element may include a concave optical surface and may be a lens element that includes an aspheric surface.

Optical system including molded optical element and method of manufacturing the optical system

A compound optical unit has combined optical elements in which two optical elements having convex optical functional surfaces are joined to each other with the optical functional surfaces facing each other, the optical elements being formed of glass. An inner flange adjacent to the optical functional surfaces of each optical element is different in thickness from an outer flange formed outsides the inner flange, the outer flange has a top face formed higher then the optical functional surface, and each of the top faces of the outer flanges are jointed to each other.

Combined optical elements

When a front panel is opened, a microcomputer decides that it reached a predetermined angle by counting the number of pulses generated by a pulse generator, and a CPU controls a power switch and turns off a power supplied to a card type record medium. Also, when the microcomputer detects an input of a front panel operation button in a state in which the front panel has opened and when a switch is ON, the CPU recognizes that the card type record medium is present and detects whether or not a terminal for connection detection of the card type record medium has been electrically connected and when it has not been connected, it is recognized that the card type record medium is in a half insertion state and a closing operation is not performed.

Electronic apparatus, power control of electronic apparatus and moving method of front panel of electronic apparatus

The invention relates to a method of manufacturing an optical element with a lens barrel, in which an optical raw material is placed on a placement portion projecting toward the center of the lens barrel from the inner peripheral surface thereof, and assuming that a distance between the opposing ends of the projection of the placement portion is L, the outside diameter of the optical raw material is L, the inside diameter of the lens barrel portion which is positioned close to and above the placement portion and to which the perimeter of the optical element obtained after forming is joined is L, and the inside diameter of the smallest opening on the upper end side of the lens barrel is L, design is performed to satisfy a relation of L&#x3c;L&#x3c;L&#x3c;L. Further, a wall surface providing said inside diameter Lis extended to a predetermined length in parallel with the optical axis to configure a straight wall surface, and the optical raw material placed on the placement portion is pressed by a pair of shaping dies consisting of an upper die and a lower die, causing the outer edge of the raw material to be joined to the straight wall surface of the inside surface of the lens barrel, wherein when the outside diameter of the optical element obtained after forming is assumed to be L, the configuration is performed to satisfy L&#x3c;L.

Method of manufacturing optical element with lens-barrel

The invention relates to a method of manufacturing a front-end optical component of an endoscope realizing resistance to humidity. In the method of manufacturing a front-end optical component in which a lens is mounted on the front end of a metallic lens-barrel provided on the front end of the inserting portion of an endoscope, the configuration is made such that a lens raw material is placed on the front-end side in the lens-barrel, the lens raw material is press-formed in a heat-softened state with a pair of upper and lower shaping dies, thereby tightly joining the outer edge of the pressed lens raw material to the inner peripheral surface of the lens-barrel.

Manufacturing method of front-end component of endoscope

An information processing apparatus (S) of an on-vehicle type is provided with a fan ( ) and a detecting device ( ) for detecting an operation status of a vehicle. The information processing apparatus is also provided with a controlling device ( ), for controlling a rotation speed of the fan in accordance with the detected operation status.

Information processing apparatus of on-vehicle type

An optical element molding method for molding an optical element having an asymmetrical optically functional surface by pressing a heated preform in which, after a center part of a transfer surface of a molding die and a center part of the preform are brought into contact with each other, peripheries of the center part of the preform are brought into contact with the transfer surface, to transfer the form of the transfer surface to the preform. Consequently, the optically functional surface shape can be favorably transferred to the preform.

Optical element molding method and optical material for molding optical element

An optical component is manufactured by precisely measuring the final volume of the optical component, precisely measuring an amount of optical material that will yield that final volume, and discharging it through a nozzle to form a spherically-shaped optical agglomerate, pressing the spherically-shaped optical agglomerate into a disc-shaped optical preform, and then using the disc-shaped optical preform to mold an optical component of a precise final volume. The disc-shaped preform fits stably on a convex upper surface of a lower mold, and the molding operation progresses uniformly and smoothly, thereby yielding a final form optical component.

Production method for molding optical components

A nozzle tip for a glass injection cartridge loaded with a rod-shaped glass material and having a heater for melting down the glass material into a molten state for injection into a mold, the nozzle tip containing:

Nozzle tip for glass injection cartridge

In a method of forming a mold release film on the surface of a glass blank from which an optical element is made by press molding, a carbon film having a thickness of less than 50 angstroms or, preferably, less than 10 angstroms is formed on the surface of the glass blank, thereby improving the releasability of the mold and the molded article with respect to each other. A glass blank (1) is subjected to ashing with an oxygen plasma so as to remove organic dirt attached to the glass blank (1). Then, plasma cleaning with an argon plasma is effected so as to remove inorganic dirt attached to the glass blank (1). Thereafter, the glass blank (1) is subjected to methane plasma processing such that a carbon film (2) having a thickness of less than 50 angstroms is formed on the surface of the glass blank (1) from which the dirt has been removed.

Growing community of inventors

Saitama, Japan

Hiroaki Fujita