Abstract: A beam splitter device (1) for a microscope (2), and for a microscope imaging method, supports at least two beamsplitting surfaces (4, 14). The two beamsplitting surfaces (4, 14) have different reflection-to-transmission ratios. The beam splitter device (1) has an optical path (3, 3a, 3b). A first one of the two beamsplitting surfaces (4, 14) is configured to be moved from a first operation position (15), in which the first beamsplitting surface (4) is located in the optical path, to a second operation position (16), in which a second (14) of the beamsplitting surfaces (4, 14) is located in the optical path. With this configuration, it is possible to change the available light in the branches (3a, 3b) of the optical path (3) after the beamsplitting surface (4, 14). This is useful if one of the branches (3a, 3b) is directed to an exit port (8) configured to receive a camera. By directing more light to the camera exit port (8), the image quality of the camera is improved.

Abstract: This application discloses systems and methods of a laser device which could be used to aim firearms. The device includes a laser diode capable of emitting two or more different wavelengths of light to form a laser using a collimator, for example a single collimator or a compound collimator. In embodiments using a single collimator, the collimator can be repositioned at different distances from the laser diode to ensure proper positioning to create a laser beam for the particular wavelength of light emitted from the laser diode. In embodiments using a compound collimator, the collimator could have different collimating regions and be configured to rotate to cause the different collimating regions to receive light emitted from the laser diode such that different light wavelengths are properly collimated without needing to alter the distance from the collimator to the laser diode.

Abstract: The watch comprises a case in which a watch movement is housed, this case being provided with a watch glass supporting a liquid zoom lens for visually magnifying, momentarily, one element of the watch movement which is visible through the watch glass. The liquid lens is formed by an elastic membrane and a first part of a reservoir comprising a transparent liquid. It is switchable between a non-magnifying state where the elastic membrane is substantially planar and a magnifying state where this elastic membrane is curved in response to pressure exerted on the transparent liquid. The watch comprises, in addition, an actuator, provided in order to vary the pressure of the transparent liquid by driving into an elastic wall of a second part of the reservoir, and means for controlling the actuator which can, in one variant, be activated by a user.

Abstract: This invention discloses a watch comprising a housing comprising a watch case and a fixed attached watch glass, a first annular flange and a second concentric annular flange arranged outside the first flange, thereby defining a groove containing at least one moveable element, wherein said watch glass is attached to one of said flanges and where said watch glass is attached to the first flange, that said watch further comprises a cover element having a top ring with first connection means enclosing a cover glass, that said second flange is provided with second connection means releaseably cooperating with said first connection means and that said cover glass covers said watch glass and said groove.

Abstract: An optical encoder is configured as follows. Namely, the optical encoder includes a signal processing circuit which processes encoder signals output from a plurality of encoder heads, a control unit which specifies one of the plurality of encoder heads, sets the signal output of the specified encoder head in an on state, and further sets the outputs of the encoder heads not specified in an off state, thereby causing only the specified encoder head to output an encoder signal to the signal processing circuit, switch signal lines, and a common wiring line which is shared by the plurality of encoder heads and which transmits the encoder signals to the signal processing circuit.

Abstract: An optical encoder device is provided, in which the number of light transmissive slits of a stationary slit plate can be increased as much as possible according to the length of a light receiving surface of a light receiving element to produce an output signal with little distortion. A movable slit plate 3 includes a slit row R1 in which a plurality of light transmissive slits (light transmissive portions) S1 each having a slit width of 180° in terms of electrical angle and a plurality of light non-transmissive slits (light non-transmissive portions) S2 each having a slit width of 180° in terms of electrical angle are alternately formed. A stationary slit plate 4 includes a slit row R2 in which a plurality of light transmissive slits S3 each having a slit width of 180° in terms of electrical angle and a plurality of light non-transmissive slits S4 each having a slit width of (360Xk-180)° in terms of electrical angle are alternately formed.

Abstract: An optical encoder for measuring the rotary angle of a rotating shaft comprising an electronic board with light emitter and light sensor means disposed between a pair of overlying light guides having a common symmetry axis that coincides with the shaft rotation axis, the light guides receiving light from a light emitter means on the electronic board and returning light to a light sensor means the electronic board; an optical pattern of two concentric annular sections attached to the rotating shaft and an optical pattern of two concentric annular sections on a stationary device. A method for measuring the rotary angle of the rotating shaft by emitting light from the electronic board into the light guides and processing the signals received on the electronic board from light rays returning through the light guides after interacting with the said optical patterns.

Abstract: A video projection device has one of a plurality of types of projection lenses replaceably loaded and projects a video on a screen at a fixed position. The video projection device includes: a converter lens which is composed of a plurality of lenses, which is afocal as a whole, and which is detachably provided in front of the projection lens to convert projection magnification; and a gap adjustment mechanism changing a predetermined gap in the converter lens to a setting in accordance with at least one of a projection distance to the screen and the type of the projection lens loaded.

Abstract: An optical encoder for measuring a relative movement of a first scale plate and a second scale plate, comprises: a light source; a first scale plate which converts light from the light source into a cyclic light quantity distribution; a second scale plate which cyclically makes spatial modulation on the light beams from the first scale plate; a third scale plate having slits which allow the light beams from the second scale plate to pass therethrough; and a light-receiving element which receives the light beams from the third scale plate; a lens which converts light from the light source into substantially parallel light beams; and an optic array which converges or diffuses light beams in the direction of periodic change and generates a cyclic light quantity distribution on the first scale plate.

Abstract: A photographing lens includes an eccentricity adjusting frame which holds an eccentricity adjusting lens group serving as a part of a photographing optical system of the photographing lens; a lens support frame, an axis of which is coincident with a predetermined optical axis of the photographing optical system, supporting the eccentricity adjusting frame in a manner to allow the eccentricity adjusting frame to move in a plane orthogonal to the predetermined optical axis during an assembly-stage of the photographing lens; and a fixed aperture member having a circular aperture, the fixed aperture member being integrally formed with the lens support frame so that a center of the circular aperture coincides with the axis of the lens support frame.

Abstract: An electric apparatus has an enlarging display unit including a lens portion corresponding to a screen of a liquid crystal display that is a display part of the electric apparatus, and a slide portion attached on a frame portion and moving up or down the lens portion without steps. A distance from the lens portion to the display part is adjustable.

Abstract: The insulin syringe with magnified sheath is a syringe with a transparent outer sleeve constructed of a material capable of magnifying printed information. The outer sleeve is slidably attached to the syringe barrel and can lock into a retracted position where it surrounds the syringe barrel and magnifies the dosage indicia thereon while exposing the syringe needle for use or can lock into an extended position where it surrounds the needle to help prevent inadvertent needle sticks.

Abstract: A magnifier for use upon labels such as labels found on medication containers or the like includes a flexible generally planar sidewall having a predisposed inward resilient curvature causing the sidewall to tend to wrap inwardly upon itself. The sidewall supports an enlarged magnifying lens portion. The sidewalls may be flexed outwardly to enlarge the enclosed volume therein and facilitate insertion of a conventional container having printed information on the outer surface or a label thereof. The portion of the printed material beneath the magnifying lens portion is enlarged to facilitate easier reading thereof. In an alternate embodiment, a cylindrical sidewall is supported by the movable cap portion of a child proof container cap and further supports a magnifying lens portion.

Abstract: A magnification device for assisting people to read the small print on medicine vials/bottles. The device including a magnifying lens having the ability to move towards or away from the indicia on the bottle to further aid the user to focus per their particular level of eyesight. A pair of rods are coaxial disposed within a corresponding pair of channels to enable the lens to be focused by pushing or pulling the lens. The present invention is designed to be used with virtually all manufactured bottle caps. The device can either be permanently affixed to the bottle cap, and thereby be disposable with the cap; or it can be removably connected and therefore be reusable.

Abstract: A magnifier for use upon labels such as labels found on medication containers or the like includes a flexible generally planar sidewall having a predisposed inward resilient curvature causing the sidewall to tend to wrap inwardly upon itself. The sidewall supports an enlarged magnifying lens portion. The sidewalls may be flexed outwardly to enlarge the enclosed volume therein and facilitate insertion of a conventional container having printed information on the outer surface or a label thereof. The portion of the printed material beneath the magnifying lens portion is enlarged to facilitate easier reading thereof. In an alternate embodiment, a cylindrical sidewall is supported by the movable cap portion of a child proof container cap and further supports a magnifying lens portion.

Abstract: An assembly for providing an adjustable optical train is disclosed. An adjustable optical train is comprised of a plate having a channel formed therein. A submount suitable for mounting an object such as an optical component (e.g., holographic medium, lens, prism, etc.) engages the channel so the submount is suitable for slidable movement along the channel. In an exemplary embodiment, the submount further comprises a fastener. The fastener may include an appendage for engaging the channel and a holder coupled to the appendage. The holder is suitable for anchoring the appendage thereby securing the appendage to the channel thereby securing the submount to the plate.

Abstract: The lens switch apparatus of present invention comprises lens mounts, lenses, a carrier, rotating axes, at least one belt, gears, motion mechanisms and the power sources. The lens mounts include the first lens mount and the second lens mount. Several lenses are positioned on the lens mounts. The carrier, on which the above lens and the lens mounts are positioned, serves as the plate to move the lens. The motion mechanism, which further includes the first motion mechanism and the second motion mechanism. The first motion mechanism move the carrier toward the first direction to focus lens properly. Besides, the second motion mechanism move the first motion mechanism toward the second direction to align lens to the optical axis. The rotating axis, which comprises the first rotating axis and the second rotating axis. Through the first rotating axis, the first lens mount is coupled to the carrier. Similarly, through the second rotating axis, the second lens mount is coupled to the carrier.

Abstract: A stereoscopic-vision endoscope of the present invention comprises a tubular elongated insertional part, an objective optical system situated in the insertional part, a relay optical system situated in the insertional part for transmitting an object image formed by the objective optical system, a pupil dividing stop for dividing a light beam emanating from an object image formed by the relay optical system into a plurality of portions, an image formation optical system for receiving light beams from the pupil dividing stop so as to form a plurality of object images having parallax, and imaging devices for picking up the object images formed by the image formation optical system. The relay optical system satisfies the condition .phi..sup.2 /L>0.43 (where .phi. denotes an outer diameter of a system of relay lenses, and L denotes a relay length of the relay optical system).

Abstract: A multi-lens optical device for use in an optical scanner including a lens holder having a viewing aperture, and a lens unit disposed in front of the viewing aperture, wherein the lens unit includes a lens holder, a plurality of lenses of different magnifying power respectively mounted on the lens holder, a reversible motor, and a reduction gearing driven by the reversible motor to move the lens holder, permitting one lens to be aligned with the viewing aperture for scanning.

Abstract: Methods and apparatus for measuring or determining refractive errors are disclosed. In some embodiments the invention includes two bars, each containing multiple lenses positioned longitudinally along the bar, and a collar adapted to constrain relative movement of the bars. Moving, or sliding, the bars and collar positions various lenses in the patient's line of sight, permitting the patient to determine which combination produces the best vision. If asymmetrical lenses are included in either bar, rotating the appropriate lens (either directly or by rotating the bar) provides additional information concerning the optimal refractive correction. The collar or bar may further comprise an indicator for signifying the angular rotation of any asymmetrical lens positioned along the patient's line of sight.