An optical component including: a substrate made from heat absorptive glass having a front surface and a rear surface, at least one of said surfaces being a crenulate surface having optical power.

A main object of the present invention is to provide a novel optical power limiting material of high performance being less susceptible to damages caused by heat occurring when an intensified laser beam is irradiated, having reversible characteristic and exhibiting a stable optical power limiting effect; production of the optical power limiting is simple and economical. The optical power limiting material of the present invention comprises a transparent substrate and an oxide(s) of at least one ...

An improved optical film having a continuous/disperse phase morphology and a method for making the same is provided. At least one of the continuous and disperse phases comprises a blend of homopolymers which are inter-reacted, as by transesterification. The resulting films exhibit a higher degree of birefringence for a given level of strain than analogous films in which the blend is replaced by a random copolymer.

Optical bond-wire interconnections between microelectronic chips, wherein optical wires are bonded onto microelectronic chips. Such optical connections offer numerous advantages compared to traditional electrical connections. Among other things, these interconnections are insensitive to electromagnetic interference and need not be located at the edges of a chip but rather can be placed for optimal utility to the circuit function. In addition, such interconnections can be given the same or other ...

A keyboard for a computer includes a rubber pad having conductive rubber cones and a recessed portion, a key unit having keys respectively disposed above the rubber cones, an upper silver grating and a bottom silver grating and retained between a frame and the rubber pad and having projecting strips with respective electric contacts projecting into the recessed portion and in contact with a circuit board mounted within the recessed portion.

A drum assembly comprises a cylindrical shell and a head on the shell; annular retainer structure on the shell and retaining the head to the shell; multiple studs rigidly attached to the shell at the outer side thereof; multiple threaded rods extending between the studs and the retainer structure; a support band extending about the shell, and at least part way about the studs; and elastomer cushions carried by the support band and extending at least part way about the studs and adjacently facing...

A musical instrument bridge (50) is supporting a set of strings (22) above a front face (14) of a musical instrument (12). The bridge has a plate (60), a mounting block (80), and a plurality of fingers (100). The plate is attachable to a rear face of the instrument. The plurality of fingers are cantilevered from the plate and extend outwardly therefrom. Each finger has a resonant frequency or rigidity that is related to a predetermined pitch of the string supported by the finger. Each finger is ...

An optical wiring device providing characteristics of optical connection leads while having substantially the same mountability as that of electrical wiring devices. According to the present invention, an optical axis of a photoelectric conversion element is made consistent with an optical axis of an optical terminal having a spherical shape through a tapered hole provided in a package substrate. An optical wiring substrate includes a concave portion attached to the package substrate with the op...

Disclosed is a method of launching a light beam from a semiconductor laser into a multimode optical fiber, as well as apparatus for launching the light beam. The light beam is directed at nominally the center of the input face of the multimode fiber such that the (unguided) light beam makes an angle .theta..sub.b (typically in the range 1-20 degrees) with the direction perpendicular to the input face of the multimode fiber. The angle .theta..sub.b is selected such that at least one lower order m...

A photoselective absorbing filter that avoids a decrease in luminance of picture elements and is capable of absorbing reflected light with high efficiency, and a color display device equipped with the photoselective absorbing filter, are disclosed. In a filter of the present invention, the transmittance of light at a wavelength ranging from 470 to 510 nm and at a wavelength ranging from 550 to 600 nm is a value smaller than a transmittance of light at a visible range other than said two waveleng...