Abstract: An optical shutter-camera includes a first optical unit, a deflecting unit, and a second optical unit. The first optical unit receives image rays from a subject and outputs first optical image rays to form a first optical image of the subject. The deflecting unit includes a deflection member and a pumping unit. The deflection member is a nonlinear optical material whose refractive index is varied by beam radiation. The pumping unit radiates a pumping beam having a variable intensity to a required region of the deflection member and varies the refractive index of the required region to variably deflect optical paths of the first optical image rays. The deflection unit is positioned so that a deflection center of the optical paths of the first optical image rays, formed when the variable intensity-pumping beam in incident on the deflection member, substantially agree with a position where the first optical image is formed.

Abstract: The present invention provides for an athletic skill practice mirror which is light weight and relatively portable. The mirror can have an alignment image whereby a participant can stand in front of the practice mirror and compare his reflective image with that of the alignment image to detect and correct improper body alignment.

Abstract: The invention relates to an objective-with-a-corrector-ring for microscopes that is of about 40 magnifications and has an NA of 0.93 with well-corrected aberrations over an ultra-wide field range, and is less likely to degrade in performance due to a thickness variation of the cover glass. This objective comprises a first lens group G1 that includes a positive meniscus lens concave on the object side and has positive refracting power as a whole, a second lens group G2 that is movable along the optical axis and has small refracting power, a third lens group G3 that is of positive refracting power and converts an exit luminous flux leaving the object and passing through said first and second lens groups to a converging flux, and a fourth lens group G4 that includes two lens surfaces opposite on the concave surfaces to each other through an air separation. The second lens group is movable relative to the first and third lens groups depending on a thickness change of the cover glass.

Abstract: A zoom lens having two units of lens components including from the object side a positive optical unit and a negative optical unit. The positive optical unit includes two lens subunits, a weak power subunit, and a positive power subunit, while the negative optical unit consists of a negative lens component and provides most of the magnification change during zooming.

Abstract: A laser scanner which includes a rotary polyhedral mirror for scanning a light beam from a laser light source, and an F.theta. lens system which includes first and second lenses through which the light beam is radiated onto a scanning plane. The first lens of the F.theta. lens system is provided on the rotary polyhedral mirror side and is constructed with a joined lens, to increase the degree of design of the first lens. This design freedom for the F.theta. lens system improves the F.theta. characteristic (i.e., characteristic of displacement on a scanning plane), the field curvature characteristic (i.e., characteristic of image defocusing on the scanning plane) and similar problems.

Abstract: Sunglasses for infants and small children are formed of a lens-defining member made of a thin flexible light-transmitting plastic material of a sun-protective composition or color. The lens-defining member has opposite projecting tabs to which flexible extendable strips are attached for supporting the sunglasses on the head of the wearer. A frame made of a soft flexible plastic foam material and having two superimposed frame members of substantially the same shape is formed by affixing each frame member to a respective face of the lens member.

Abstract: The invention is directed to an ophthalmoscope and especially a confocal raster ophthalmoscope wherein the scanning unit can be imaged on the pupil of the eye with different imaging scales. The switchover between the imaging scales is realized by a displacement of a spherical concave mirror of the ophthalmoscope. The astigmatism of the concave mirror is changed because of the changed imaging scale and is compensated in that the displacement of the concave mirror has a displacement component perpendicular to the main axis of this mirror.

Abstract: A rearview mirror apparatus for a motor vehicle, includes a mounting piece attachable to the motor vehicle; a prismatic body consisting of an intermediary part pivotally connectable to the mounting piece and a holder having an anterior opening; and a mirror element mounted in the anterior opening of the holder. The holder is symmetric relative to a longitudinal horizontal "X" axis thereof and has two bases projecting from one side thereof and the bases are positioned symmetrically on opposite sides of the "X" axis. The intermediary part has two corresponding projecting end pieces positioned to engage the two bases when the holder engages the intermediary part. The bases each have a mounting hole and one of the projecting end pieces has a threaded hole positioned so that, when the holder is engaged with the intermediary part, the holder can be secured to the intermediary part by a fixing screw engaged in the threaded hole and one of the holes of the bases.

Abstract: A door mirror including a stay, a bracket that is made of a fiber reinforced synthetic nylon resin having glass fibers that form 50 percent of the total weight and is pivotally disposed on the stay, and a drive unit disposed on the bracket, to which a pair of main mirror bodies are fixed. This configuration reduces the weight of the bracket and the door mirror.

Abstract: A zoom lens (10) has a first lens group (12), a second lens group (14) and a third lens group (16). The first lens group relays an outside scene to an intermediate plane. The second lens group varies magnification of the relayed image from the first lens group. Also, the second lens group includes at least one diffractive optical element. The third lens group compensates for focus shift and focuses the wavefront onto the viewing plane.

Abstract: This invention relates to a compact zoom lens. The zoom lens comprises of small number of elements arranged in three groups. The first group has negative refractive power, the second group has positive refractive power and the third group has negative refractive power. The air space between each of two adjacent groups is made variable to effect zooming.

Abstract: A lighted vanity mirror module for an automobile sun visor comprises a housing (35) including a base (40), a bezel (45) covering the base and supporting a mirror (20), and electric lamps (25) supplied with electric current through circuitry (55) embedded within the base. A hinged cover (30) is unlatched and the lamps energized by actuation of a single, combined latch and on-off switch (60). Interfitting lamp compartments (135) and (150) minimize light leakage into the interior of the housing, align the bezel with the base and provide fastening of the bezel to the base. A light dimming control (65) is also provided.

Abstract: A spherical multicomponent optical isolator having a first spherical segment lensing region, including a base, a second spherical segment lensing region, including a base, a first polarizer attached to the base of the first segment lensing region, a second polarizer attached to the base of the second spherical segment lensing region and A Faraday rotator disposed between the first and second polarizers, wherein the combination of the first and second spherical segments, the first and second polarizers and the Faraday rotator forms the spherical optical isolator having a spherical outer surface.

Abstract: An autofocusable soft focus lens system includes a movable front lens group having a positive power, and a stationary rear lens group having a negative power.

Abstract: A levitating support and positioning system (10) is provided for orienting an electromagnetic energy reflecting assembly (40). System (10) includes a reflective member (60) supported by an annular ring (50) having a plurality of superconductors (70) disposed thereon. Ring (50) is levitated above a base surface (20) by means of a plurality of electromagnetic assemblies (30), each of the electromagnetic assemblies (30) corresponding to a respective one of the plurality of superconductive elements (70), whereby the magnetic fields generated by the electromagnetic assemblies (30) are repelled by the respective superconductive elements. The orientation of the support ring (50), and the reflector therewith, is adjusted by changing the relative magnetic field strength between each of the electromagnetic assemblies (30), allowing the reflector to be directed in both elevation and azimuth.

Abstract: Selective light-transmitting filters for use with catadioptic area-of-interest display projectors and projection system provide complementary filters for two or more persons. One of the complementary filters permits all radiance at one predetermined, desired wavelength to be transmitted while rejecting or absorbing all others. The complementary filter for a second viewer transmits substantially all radiance at a second predetermined desired wavelength and absorbs or reflects all others, thus permitting each viewer to see only predetermined, desired displays or parts of a display that are projected simultaneously within the system.

Abstract: A rearview mirror suitable for vehicles, especially motor vehicles, is composed of a transparent substrate, preferably of soda silica glass and a rear reflection coating comprising a metal mirror layer, preferably chromium, and a dielectric triple interference layer system placed between the metal mirror layer and the transparent substrate. The triple interference layer system comprises, in contact with the metal layer, a dielectric layer having a high refractive index, e.g., titanium dioxide, a next layer having a low refractive index, e.g., silicon dioxide, and next a dielectric layer having a medium refractive index, e.g., a mixed TiO.sub.2 and SiO.sub.2 layer. With the selection of suitable layer thicknesses, a total reflection of at least 40% and a blue reflection tint, independent of the viewing angle, are attained.

Abstract: A code plate mounting device for mounting a code plate on an outer peripheral surface of an annular member in a lens barrel. A pair of engaging portions are provided on the outer peripheral surface of the annular member, and are spaced from one another in a circumferential or axial direction of the annular member. A tension member is connected at one end to one end of the code plate. An engaging portion is provided on the other end of the code plate to engage with one of the engaging portions of the annular member. An engaging portion is provided on the other end of the tension member to engage with the other engaging portion of the annular member.

Abstract: Non-slip assembly of a spectacle frame made of synthetic material includes two silicone elements filling two respective depressions formed at two nose pads of the spectacle frame. Each silicone element is rigidly held in the respective depression as a viscous silicone is cured. Each silicon element is flush with an edge of the respective depression.

Abstract: In a zoom lens device of a two-lens group structure, positive and negative lens groups are sequentially arranged from a photographing field side. The zoom lens device has a controller for controlling a rear focusing operation for moving the negative lens group on a high magnification side. The controller also controls one of an entire drawing-out focusing operation for moving the positive and negative lens groups, and a front focusing operation for moving the positive lens group on a low magnification side. The high and low magnification sides are respectively set to telescopic and wide angle sides. A focal length of the zoom lens device is increased on the high magnification side and is decreased on the low magnification side. Thus, a zoom ratio is increased and a lens drawing-out amount is reduced on the telescopic side so that the zoom lens device can be made compact.