摘要:
A vehicle rear suspension system having a vertically swingable arm connected at the front end swingably to the vehicle body and secured at the rear end to a wheel carrying member which carries a rear wheel for rotation. Three lateral links ar provided and have inward ends pivotably connected to the vehicle body and outward ends pivotably connected to the wheel carrying member. The points of connection of the three lateral links to the wheel carrying member are not aligned in a straight line so that the orientation of the wheel carrying member can appropriately be controlled under bump and rebouncing movements of the rear wheel and under side and longitudinal forces acting on the rear wheel.
摘要:
A vehicle rear suspension system having a vergically swingable arm connected at the front end swingably to the vehicle body and secured at the rear end to a wheel carrying member which carries a rare wheel for rotation. Three lateral links are provided and have inward ends pivotably connected to the vehicle body and outward ends pivotably connected to the wheel carrying member. The points of connection of the three lateral links to the wheel carrying member are not aligned in a straight line so that the orientation of the wheel carrying member can appropriately be controlled under bump and rebouncing movements of the rear wheel and under side and longitudinal forces acting on the rear wheel.
摘要:
In a spectrographic type spectrometry measuring apparatus employing a concave holographic diffraction grating or a replica thereof, a small-size and light-weight spectrometry measuring apparatus having a high reliability with a spectrum position does not move in a photo detector plane in spite of an occurrence of a temperature change. This measuring apparatus is composed of a light-condensing device, a concave holographic diffraction grating or a replica thereof, and a telecentric correction lens for condensing a diffracted light from the diffraction grating telecentrically on the spectrum condensing plane. In this constitution, the spectral ray enters vertically to the spectrum focusing plane, and if the photo detector is moved in the optical axis direction due to a temperature change, the spectrum is not moved on the photo detector surface, and it is not necessary to calibrate an optical element due to an ambient temperature change.
摘要:
A reticle/wafer alignment system provided with a laser beam source for emitting laser beams, a first optical system portion for a reticle/wafer alignment which consists of a first optical sub-system for receiving laser beams from the laser beam source and projecting the received laser beams onto alignment marks formed on a substrate and made up of diffraction gratings and a second optical sub-system for gathering laser beams diffracted by the alignment marks to form an image thereof, a photoelectric detection portion for performing a photoelectric conversion of the gathered laser beams, a position detecting portion for measuring the position of the substrate based on a signal outputted from the photoelectric detection portion, a second optical system portion for an image processing which consists of a third optical sub-system for illuminating the alignment marks and a fourth optical sub-system having a television camera for observing the image of the alignment marks, and an image processing portion for performing an image processing of video signals outputted from the television camera. The first and second optical system portions are made in such a manner to have a common part thereof. Thereby, an entire alignment system can be made to be compact. Consequently, a position measurement accuracy can be improved.
摘要:
An f.multidot..theta. lens system for use in an apparatus such as a facsimile, machine laser printer, and the like for scanning and recording by a laser beam. The lens system minimizes the amount of image distorted in the sagittal direction and provides equal angular scanning velocity, high brightness and high resolution. The lens system comprises five serially disposed lenses the first of which is a positive meniscus lens whose concave surface is directed toward the incident side of a laser beam, the second lens is a negative meniscus lens whose concave surface is directed toward the incident side of the laser beam, and the third to fifth lenses a positive meniscus lenses whose concave surfaces are directed toward the beam incident side, wherein these lenses satisfy particular conditions relating to the radii of curvatures of their surfaces, lens thickness, refractive indices and lens-to-lens distances.
摘要:
A method and apparatus for controlling needles of a knitting machine based upon comparing a plurality of predetermined position control patterns defining target positions with the position of a yarn feeder and a needle. When the positions are not the same, each needle is incrementally moved based upon the present position of the needle and the determined target position of the needle.
摘要:
A projection optical system for use in a precise copy which uses a pair of catadioptric optical systems consisting of convex mirrors, concave mirrors, and phase correction members is shown. Two catadioptric optical systems commonly use an entrance pupil on a coaxis and are coupled so as to respectively face the phase correction members. Each of the concave mirrors has an opening at the center. Each of the convex mirrors has no opening in one embodiment but has an opening portion at the center in another embodiment.
摘要:
A projection optical system for photolithography includes a refraction sub-system and a cata-dioptric sub-system optically connected to each other. The refraction sub-system extends at an object side. The cata-dioptric sub-system extends at an image side. The refraction sub-system is generally composed of refracting members. The cata-dioptric sub-system is generally composed of a phase compensating member, a concave mirror, and a convex mirror. The phase compensating member adjoins the refraction sub-system. At least the concave mirror has a central opening through which light passes. The light forms an image at a rear of the concave mirror.
摘要:
In an measuring method for optical transfer function of the invention, irradiating-light from a light source (31) scans an element to be measured within an image sensor of an imaging camera constituted by integrating an imaging optical system and the image sensor. The element to be measured converts sequentially the irradiating-light into an electrical signal and outputs the electrical signal. Further, based on the outputted electrical signal, point spread function data is generated, and subjected to Fourier transform to calculate an optical transfer function. Accordingly, a method is provided for measuring an optical transfer function for properly restoring image degradation due to factors including the position of the imaging optical system within the imaging camera and inter-element cross talk.
摘要:
A linescan apparatus for detecting salient pattern on a surface of a product comprises: a laser light source for continuously emitting a laser beam; a polygon mirror for reflecting the laser beam; a drive for rotating the polygon mirror to scan said laser beam; an f.theta. lens arranged such that the linescan laser beam strikes against the plane perpendicularly; a carrying device for moving the product in the direction substantially perpendicular to the plane; a mirror for reflecting the linescan laser beam reflected at a surface of the product to direct the linescan laser beam to the polygon mirror through the f.theta. lens, the mirror being positioned apart from the second plane; and a beam position detector for detecting unidimensional position of a spot mede by the linescan laser beam projected thereon from the mirror via the polygon mirror. This linescan apparatus provides three-dimensional data of a surface of the product. The detected position signal is compared by reference data for inspecting the product. An linescan apparatus further comprises second beam position detector and an averaging circuit for averaging outputs from first mentioned and second beam detectors.