An adjusting mechanism for a lens comprises a mount, a sphere, a pressing ring, a positioning housing, a fixing ring, a lens, and an adjusting ring. Three protruding members are provided radially and horizontally around the circumference of the sphere. The sphere is stably disposed on the mount in an opening having a spherical surface provided on the center of the mount by three tension springs each secured between the protruding members and the mount. The inside of the sphere forms cylindrical space to accommodate the lens. The lens only axially moves with respect to the sphere by turning an adjusting ring screwed onto the sphere. The positioning housing is fixed on the mount around the sphere and the fixing ring is fastened on the top of the positioning housing. The pressing ring being disposed between the fixing ring and the sphere pushes against the surface of the sphere by the pressing of a circular flange provided along the inner rim of the fixing ring such that the sphere is restricted to rotate in the space formed between the pressing ring and the mount. The sphere rotates in three dimensions to adjust the lens precisely by turning three adjusting screws, wherein each adjusting screw comes into contact with the protruding member.
An optical element holder having a simple structure and which is capable of being adjusted in six axes is disclosed. A movable plate is disposed among two pairs of side walls of a base, and a rotary plate for holding an optical element is integrally and rotatably held in the movable plate. The movable plate is adjusted by adjusting springs attached to one pair of side walls of the two pairs of side walls, and by adjusting screws attached to the other pair of side walls of the two pairs of side walls. The movable plate is moved along the base for adjustment with respect to the X and Y directions. The rotary plate is pushed by a coiled spring, which is rotated for adjustment with respect to the .theta. direction by an adjustment screw attached to the rotary plate. The movable plate and the rotary plate are integrally pushed toward the base by a plate spring, and by four adjustment screws attached to the rotary plate. The height in the contacting and separating direction Z of the movable and rotary plates with respect to the base, and tilts .theta.1 and .theta.2 about the X and Y axes, are also adjusted by the plate spring and the four adjustment screws attached to the rotary plate.
A method and apparatus for adjusting spatial light modulators in an imaging system. The apparatus includes several screws, plungers and pins connecting to a housing. When the screws and plungers are adjusted, the device held by the housing is manipulated along the x, y and z axes, allowing the device to be focused and aligned. If multiple modulators are involved, they can also be converged. The method includes the steps of mounting the devices in adjustable sockets, aligning each device, focusing each device and then positioning images from each device to converge with images from other devices.
The present invention is a mount for optical instruments, and particularly, for a Berek compensator having a birefringent crystal, which can be both tiled and rotated by structure of adjustment rings which are concentric to the optical path of the device.
A lens device includes: a housing formed with a module-mounting hole that has a hole axis, and provided with a mounting surface that is disposed radially and outwardly of the module-mounting hole; a lens module having a lens axis; and an alignment correction unit for mounting the lens module on the housing at the module-mounting hole. The alignment correction unit includes a module barrel coupled to the lens module, an elastically deformable component clamped by the module barrel toward the mounting surface of the housing, and a set of screw fasteners for fastening the module barrel onto the mounting surface at angularly spaced apart locations relative to the hole axis. Depths of threaded engagement of the screw fasteners with the mounting surface are independently adjustable to permit adjustment of the lens axis of the lens module relative to the hole axis of the module-mounting hole.
An image pickup apparatus includes an image pickup unit in the form of a hollow ball having an image sensor inside thereof and a lens for focusing an optical image onto the image sensor, a first magnetic member fixedly attached to the image pickup unit, a holder for rotatably holding the image pickup unit, a second magnetic member for magnetically attracting the first magnetic member, and a mover for moving the second magnetic member to thereby rotate the image pickup unit so that the lens orients in a desired direction.
