摘要:
A wavelength selective optical recording and reproducing device has a reference wavelength in a marker hole of a medium. The optical detector is adapted to detect light which is reflected from or transmitted through the marker hole. A phase detector detects the phase of an output of the optical detector by using a high frequency signal as a reference to obtain a signal indicative of the deviation of the wavelength of the output from a desired wavelength. A wavelength regulator is responsive to the wavelength deviation to control the wavelength of the light source to be the desired wavelength.
摘要:
A wavelength selective optical recording and reproducing method includes an optical recording and reproducing step of information composed of time series signals on a recording medium having recording tracks as position series signals with light having a variable wavelength while switching the wavelength between predetermined values.
摘要:
The invention relates to an optical computing element for use in an optical computer utilizing computing light rays having a plurality of wavelength components. The optical computing element comprises a photo-chemical hole burning element which functions as a wavelength selecting filter of the computing light rays. Therefore, the optical computer using the photo-chemical hole burning element of the invention can perform arithmetic operations by taking advantage of differences in optical wavelength. The computer can efficiently perform bulky arithmetic processing, and can also speedily perform arithmetic operations through simultaneous parallel processing for information.
摘要:
An apparatus in accordance with the present invention sequentially fixes the wavelength of a light beam irradiated from a light source whose oscillation wavelength sequentially varies to a plurality of different wavelengths to a recording medium to required wavelengths each capable of forming a hole at absorption spectrum of the recording medium, synchronizes timing of change of the wavelength of the light source with timing of recording or regenerating each bit of information, records the optical hole formed in a manner that each bit of information corresponds to the wavelength varying in sequence, and detects the formed hole to regenerate information. Furthermore, the holes formed by the same wavelength are recorded at the positions separated by a distance capable of avoiding interference, while the holes formed by different wavelengths in correspondence to each bit of information are recorded at nearly the same position while that position is slightly displaced at a time, and thereby information is multiple-recorded with high density.
摘要:
The invention relates to an optical computing element for use in an optical computer utilizing computing light rays having a plurality of wavelength components. The optical computing element comprises a photo-chemical hole burning element which functions as a wavelength selecting filter of the computing light rays. Therefore, the optical computer using the photo-chemical hole burning element of the invention can perform arithmetic operations by taking advantage of differences in optical wavelength. The computer can efficiently perform bulky arithmetic processing, and can also speedily perform arithmetic operations through simultaneous parallel processing for information.
摘要:
The present invention provides a resin composition comprising a liquid crystal polyester and a titanium oxide filler, wherein when a value obtained by converting the content of aluminum in the titanium oxide filler to the content of aluminum oxide is A (% by weight) and the volume average particle diameter of the titanium oxide filler is B (μm), A and B satisfy the formula (I): A≧0.1 and the formula (II): A/B2≦25, a reflective board obtained by molding the resin composition, and a light-emitting apparatus comprising the reflective board and a light-emitting element. According to the resin composition of the present invention, a reflective board having high reflectance and high heat resistance can be obtained. Furthermore, a light-emitting apparatus which is excellent in properties such as luminance can be obtained by using the reflective board.
摘要:
A method is provided for manufacturing a liquid crystal polyester molded body by molding a liquid crystal polyester composition using a molding machine containing a cylinder, a screw and a heater. The screw is provided inside the cylinder, and is composed of a feed section, a compression section, and a metering section, the feed section and the compression section of the screw are composed of a single flight, the heater is provided on the outer periphery of the cylinder. The liquid crystal polyester composition contains a liquid crystal polyester and a polyamide resin. The method for manufacturing the polyester molded body includes: a step of melting and metering the liquid crystal polyester composition, a step of tightening a mold and performing mold clamping, a step of injecting the melted liquid crystal polyester composition into the mold, and a step of extracting the solidified resin from inside the mold.
摘要:
The present invention provides a resin composition comprising a liquid crystal polyester and a titanium oxide filler, wherein when a value obtained by converting the content of aluminum in the titanium oxide filler to the content of aluminum oxide is A (% by weight) and the volume average particle diameter of the titanium oxide filler is B (μm), A and B satisfy the formula (I): A≧0.1 and the formula (II): A/B2≦25, a reflective board obtained by molding the resin composition, and a light-emitting apparatus comprising the reflective board and a light-emitting element. According to the resin composition of the present invention, a reflective board having high reflectance and high heat resistance can be obtained. Furthermore, a light-emitting apparatus which is excellent in properties such as luminance can be obtained by using the reflective board.
摘要:
A pressure loss section H1 (H2) extends from a position corresponding to a corner of a resin package, and S1 is the minimum value of the opening area of the pressure loss section H1 (H2) perpendicular to the direction of resin flow (X axis) in the pressure loss section H1 (H2) during resin molding, while S2 is the average value of the opening areas of excess resin reservoirs H3 to H5 perpendicular to the direction of resin flow (Y axis) within excess resin reservoir H3 to H5 during molding. In this lead frame, S1
摘要:
Granules useful for highly thermal-conductive resin composition are provided. The Granules have a number average particle diameter of 0.5 to 5 mm, obtained by granulating fibers mainly containing fibers selected from alumina fibers and carbon fibers, wherein the fibers to be granulated have a number average fiber diameter of 1 to 50 μm.