Abstract: A lens specifying apparatus comprising a light source (21) for projecting a measuring light beam on a lens (30) under examination, an area CCD (35) image receiving element for receiving the measuring light beam transmitted by the lens (30) under examination, a filter disc (64) disposed, as means for providing spectral transmittances, at a midpoint of an optical path extending from the light source (21) to the area CCD (35), and a processing circuit (37) for calculating the refractive characteristics and spectral transmittances of the lens (30) under examination on the basis of an output of the area CCD (35) and displaying the refractive characteristics and spectral transmittances on a monitor (3).

Abstract: A standard white paint with good weather resistance and improvement of reflectivity characteristics for UV as well as adhesion to the substrate is provided. The white standard paint of the present invention contains barium sulfate, binder and solvent in which Polyvinyl alcohol is used as binder. The polymerization degree of the polyvinyl alcohol is ranging from 900 to 1100 and the saponification degree is ranging from 86 mol % to 90 mol %.

Abstract: A lens specifying apparatus comprising a light source (21) for projecting a measuring light beam on a lens (30) under examination, an area CCD (35) image receiving element for receiving the measuring light beam transmitted by the lens (30) under examination, a filter disc (64) disposed, as means for providing spectral transmittances, at a midpoint of an optical path extending from the light source (21) to the area CCD (35), and a processing circuit (37) for calculating the refractive characteristics and spectral transmittances of the lens (30) under examination on the basis of an output of the area CCD (35) and displaying the refractive characteristics and spectral transmittances on a monitor (3).

Abstract: A lens meter is provided which comprises a light source for generation of a measuring light beam and a pattern forming plate provided in an optical path of the measuring light beam. The pattern forming plate has a central pattern for measuring lens characteristics of a narrow area on an eyeglass lens and a plurality of peripheral patterns for measuring lens characteristics of a wide area on the eyeglass lens. The pattern forming plate can be switched between a normal measuring mode which receives the image of the central pattern based on the measuring light beam transmitted through the narrow area of the eyeglass lens and also measures the narrow area alone and displays the measured values and a wide-area measuring mode which receives a great number of images of the peripheral patterns based on the measuring light beam transmitted through the wide area of the eyeglass lens and also measures the wide area and performs mapping display.

Abstract: A lens meter having a projection system (5) provided with a projection light source (7) adapted to project a measuring beam onto a lens (14) to be examined, and a light receiving system (6) provided with a light receiving element (15) adapted to receive the measuring beam which has passed through the test lens (14), the optical characteristics of the test lens (14) being determined on the basis of a position in which the light receiving element (15) receives the measuring beam which has passed through the test lens, comprising a test lens turning mechanism (16) adapted to turn the test lens (14) around a center (0) of a turning movement corresponding to that of a turning movement of an eyeball in a spectacle lens-worn state.

Abstract: A lens meter is provided in which a measurement light beam emitted from a light source (21) is projected onto a lens (L) to be inspected, an amount in travel of the measurement light beam which has passed through the lens (L) is then detected by a TV camera (34), and the refractive characteristics of the lens (L) based on the detection result are computed by an arithmetic and control circuit (35) and are displayed by a display unit (3). In the lens meter, the arithmetic and control circuit (35) computes cylindrical power of a distance portion (40) of the lens (L) in consideration of cylindrical power and a direction of a cylindrical axis from the detection result of the TV camera (34), and then computes cylindrical power in distortion areas (42, 43) except the distance portion (40), a progressive portion (41), and a near portion (41') in consideration of the cylindrical power and the direction of the cylindrical axis.

Abstract: A lens specifying apparatus is provided which includes a lens meter (1) for measuring and obtaining the lens refraction characteristic distribution information of a subject lens (30), an information recording/regeneration unit (104) on which lens information has been recorded, an arithmetic control circuit (101a) for comparing the lens refraction characteristic distribution information measured by the lens meter (1) with the lens information recorded on the information recording/regeneration unit (104) and judging to which lens information the measured lens refraction characteristic distribution information corresponds.

Abstract: On a monitor (52) there is displayed a synthesized image (G4) in which an image (G1) of a subject lens showing a refractive power distribution, an image (G2) of a lens frame, and an eyepoint mark image (G3) are superimposed based on the refractive power distribution data of the subject lens by a lens meter (100), on the frame shape data of the lens frame by a frame shape measurement apparatus (200), and on the eyepoint data by an eyepoint measurement apparatus (300).

Abstract: A lens meter is provided in which a beam of light from an illumination optical system (20) is made incident upon a lens (40) to be inspected, the light beam which has passed through the lens (40) is then received by a light receiving sensor (33b) through a lens platform (13) disposed on a lens receiving table (11) and a light receiving optical system (30), and the two-dimensional optical characteristics of the lens (40) are measured from a detection result of the light receiving sensor (33b). In the lens meter, the lens platform (13) is formed to have such an area as to guide light coming from the middle of the lens (40) and from a predetermined range around the middle to the light receiving sensor (33b), and projections (13b) are formed for determining a light reception distance (2) from the lens (40) to a relay lens (32) of the light receiving optical system (30).

Abstract: A lens meter is provided which comprises a light source for generation of a measuring light beam and a pattern forming plate provided in an optical path of the measuring light beam. The pattern forming plate has a central pattern for measuring lens characteristics of a narrow area on an eyeglass lens and a plurality of peripheral patterns for measuring lens characteristics of a wide area on the eyeglass lens. The pattern forming plate can be switched between a normal measuring mode which receives the image of the central pattern based on the measuring light beam transmitted through the narrow area of the eyeglass lens and also measures the narrow area alone and displays the measured values and a wide-area measuring mode which receives a great number of images of the peripheral patterns based on the measuring light beam transmitted through the wide area of the eyeglass lens and also measures the wide area and performs mapping display.

Abstract: A lens meter is provided which includes a light source portion (20) with a first light source (21) for generating a lens-characteristic measuring light beam (P2) and a second light source (23) for generating a position specifying light beam (P1). A patterning plate (28) with lens-characteristic measuring patterns (28c) and position specifying patterns (28b) is disposed in an optical path (31) of the lens-characteristic measuring light beam (P2) and position specifying light beam (P1) generated by the light source portion (20). The measuring light beam (P2) is projected onto a subject lens (30) set in the optical path (31) so that the images (28c') of the lens-characteristic measuring pattern (28c) are received. The received images (28c') are analyzed, and the lens-characteristic mapping display of the subject lens (30) is performed. In this lens meter, the first and second light sources (21, 23) are separate from each other.

Abstract: A progressive power lens (L) is illuminated with a collimated light beam through an illuminating optical system (2) comprising an LED (5), a pinhole plate (6), and a collimator lens (7). The shadow of the hidden mark of the progressive power lens (L) is projected onto a screen (4) by the light beam transmitted through the progressive power lens (L).

Abstract: The invention provides a lens bearer for bearing thereon a lens to be checked for an optical performance thereof. The lens bearer has a lens bearer body for bearing the lens thereon, and a covering member for being removably fitted on a lens-bearing portion of the lens bearer body, for placing the lens thereon. The covering member is made of a material which is softer than the lens bearer body. This makes it possible to replace the covering member alone when the lens bearer is used many times, thereby preventing deformation of a portion of the lens bearer which is brought into contact with lenses, and protecting the surface of the lens from being damaged.

Abstract: A lens meter having an optical measuring system which can measure optical characteristics of a progressive lens includes a memory means which stores the optical characteristics of each measuring point measured in a range from a far vision region to a near vision region by the optical measuring system, a distinguishing means which compares the optical characteristics of each measuring point stored in the memory means and distinguishes whether the measured points belong to a progressive band or areas located in both right and left sides of the progressive band, a display means which displays a result of the distinguishing means. With this structure, the optical characteristics of each measuring point can be measured ranging from the far vision region to the near vision region by the optical measuring system, and the results are stored in the memory means.

Abstract: Lens meter and method of measurement of progressive multifocal lens using the same which is able to set the amount of movement of the lens and to simply position a far- or near-distance refraction characteristics-measuring portion of a progressive multifocal lens. In accordance with the method the optical center of a lens is first found from measurement employing the lens and using the optical center as point of origin, the lens is moved by a distance up to the far-distance refraction characteristics measuring portion and the near-distance refraction characteristics measuring portion of the lens mentioned by the lens manufacturer, so as to effect alignment with the measurement optical axis of the lens meter, thereby measuring the refraction characteristics of each measuring portion.

Abstract: A lens judging apparatus to be used in a lens meter is disclosed. It has at least one projecting device movably mounted on the both sides of a lens table with respect to its elongated direction. The projecting devices are movably arranged within a predetermined range in the traversing direction relative to the elongated direction of the lens table by receiving the respective spectacles hung thereon. It also has a detector for the movement of the projecting member, a device for judging whether the spectacle lens is for the right or left by detecting a signal emitted from the detector, and a display panel showing a character measuring either "right" or "left" based on the result of judgment made by the judging device.