摘要:
An optical pickup lens for focusing a light beam from a laser light source on an optical information recording medium is a single lens. The optical pickup lens has two surfaces, and a surface R2 opposite to a surface R1 closer to the laser light source has a continuous shape. When the surface R2 has radii h1, h2 and h3 (h1 Δsag1>Δsag2 and Δsag2
摘要:
An object of the invention is to provide a plastic objective lens having a good lens tilt property in both thicknesses of a two-layer disc in a used temperature range even in the plastic objective lens in which a numerical aperture (NA) is equal to or higher than 0.81, while dissolving the problem mentioned above. The objective lens includes a point at which a third order comma aberration amount generated at a time of a lens tilt of the objective lens becomes equal to a third order comma aberration amount generated at a time when a disc is tilted at the same angle amount as the lens tilt angle, in a transparent board thickness which is thicker than a larger thickness of the two-layer transparent board under a room temperature (25±3° C.).
摘要:
An optical pickup lens includes a first surface to focus laser light for recording/playback on an optical disc, a second surface formed outside the first surface and radiated with laser light for lens tilt detection, and an antireflection coating to transmit the laser light for recording/playback, the antireflection coating being continuously formed on the first surface and a second surface.
摘要:
A device for tightening the waist of a garment comprising a sheath provided around the waist of a garment which has an opening near each end thereof and a pair of strings, each of which is secured to one end of said sheath and is passed through the sheath and drawn out of the opening at the other end thereof is disclosed.
摘要:
An object of the invention is to provide a plastic objective lens having a good lens tilt property in both thicknesses of a two-layer disc in a used temperature range even in the plastic objective lens in which a numerical aperture (NA) is equal to or higher than 0.81, while dissolving the problem mentioned above. The objective lens includes a point at which a third order comma aberration amount generated at a time of a lens tilt of the objective lens becomes equal to a third order comma aberration amount generated at a time when a disc is tilted at the same angle amount as the lens tilt angle, in a transparent board thickness which is thicker than a larger thickness of the two-layer transparent board under a room temperature (25±3° C.).
摘要:
An optical recording medium which can precisely reproduce recording pits formed in pregrooves having width narrower than the diameter of a reproducing beam spot, and which can reduce the jitter and the block error rate, wherein the following unequal equation is satisfied: 0
摘要:
A connector, particularly designed for attachment to an automobile door having an opening therein, including a hood passing through the opening when the device is installed. The hood carries, on one surface, a lock piece with an engagement projection and its distal end. Since the entire connector is molded of resin, contact with the perimeter of the opening in the door can scratch the sloped surface of the engagement projection and hinder its insertion. There is provided a metal cover fitting over a sloped surface of the lock piece so that, when the connector is inserted, there is only metal to metal contact between the perimeter of the opening and the cover of the slope surface. In this way, even if there is flash around the perimeter, the connector can be smoothly and readily attached.
摘要:
Compounds of formula (I): ##STR1## (wherein: R.sup.1 is optionally substituted alkyl, cycloalkyl, optionally substituted alkoxy, or optionally substituted alkylthio; R.sup.2 is hydrogen, optionally substituted alkyl, cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl or a group of formula --YR.sup.7 ; R.sup.3 is optionally substituted alkyl, cycloalkyl, optionally substituted alkoxy group, optionally substituted alkenyl, optionally substituted alkynyl, halogen, nitro or a group of formula --COR.sup.8, wherein R.sup.8 is hydrogen, alkyl, cycloalkyl or alkoxy; R.sup.4 and R.sup.5 are each hydrogen atom or alkyl; R.sup.6 is optionally substituted alkyl, cycloalkyl, optionally substituted alkoxy group, optionally substituted alkenyl, optionally substituted alkynyl, halogen, nitro, or a group of formula --COR.sup.8, as defined above; A, Q and X are each oxygen or sulfur; Y is a group of formula --CO--, --COO--, --CH.sub.2 O--, --CH.sub.2 S--, --CH.sub.2 CH.sub.2 O--, --CH.sub.2 CH.sub.2 S--, --CH.sub.2 CO--, --CH.sub.2 COO--, --CH(Me)COO--, --CH.sub.2 CH.sub.2 CO--, --CH.sub.2 OCO--, CH.sub.2 OCOO-- and --CH.sub.2 CH.sub.2 OCO--; R.sup.7 is optionally substituted alkyl group, cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl, optionally substituted aralkyl, or an optionally substituted heterocycle; and m and n are each an integer from 0 to 4; and herbicidally acceptable addition salts thereof) are useful as herbicides.
摘要翻译:式(I)化合物:其中:R 1为任选取代的烷基,环烷基,任选取代的烷氧基或任选取代的烷硫基; R 2为氢,任选取代的烷基,环烷基,任选取代的烯基,任选取代的炔基 或式-YR 7的基团; R 3是任选取代的烷基,环烷基,任选取代的烷氧基,任选取代的烯基,任选取代的炔基,卤素,硝基或式-COR 8的基团,其中R 8是氢,烷基,环烷基或烷氧基 R 4和R 5各自为氢原子或烷基; R 6为任选取代的烷基,环烷基,任选取代的烷氧基,任选取代的烯基,任选取代的炔基,卤素,硝基或如上定义的式-COR 8基团; Q和X各自是氧或硫; Y是式-CO-,-COO-,-CH2O-,-CH2S-,-CH2CH2O-,-CH2CH2S-,-CH2CO-,-CH2COO-,-CH( Me)COO - , - CH 2 CH 2 CO - , - CH 2 OCO - ,CH 2 OOO-和-CH 2 CH 2OCO-; R 7是任选取代的烷基,环烷基,任选取代的烯基,任选取代的炔基,任选取代的芳基,任选取代的芳烷基或任选取代的杂环; m和n分别为0〜4的整数。 和除草剂可接受的加成盐)可用作除草剂。
摘要:
A fabric article comprises a piece of stretch fabric and a piece of woven non-stretch fabric in superposed relationship, the two pieces of fabric being secured together in stretch-resisting manner, e.g. by stitching, along first and second lines which extend transversely to each other and obliquely to both the warp and weft directions of the woven fabric.