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1.发明专利
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公开(公告)号：DE2934263A1
公开(公告)日：1981-03-26
申请号：DE2934263
申请日：1979-08-24
Applicant: ZEISS CARL FA
Inventor： TROETSCHER OTTO DR PHIL , STACKLIES HORST ING GRAD , MAECHLER MEINRAD
Abstract: The invention contemplates a method and apparatus for automatically performing digital measurement of vertex dioptric powers in the principal planes of toric spectacle lenses. A spectacle lens is transilluminated by a parallel-ray bundle of monochromatic light which, after passage through the spectacle lens, is limited by an annular stop in the immediate vicinity of the vertex of the spectacle lens. A beamsplitter divides the light which passes through the spectacle lens into two individual light beams. As a result, an elliptical figure is projected to two planes, in each of which is located at least one self-scanning diode line. Diode-line scanning develops intercepts of the projected elliptical figure, and from the positional locations of these intercepts (in relation to the local intercept of the optical axis) a computer performs a selected one of a plurality of evaluation procedures (a) to develop projected-figure reorientation or displacement as necessary to permit it then (b) to perform a desired measurement evaluation. Provision is made for automatic detection of whether a given spectacle lens is or is not within the currently set range of measurement capability and, if determined to be outside such range, the fact of such detection is operative to change optical elements of the apparatus for optimum measurement-range accommodation of the particular spectacle lens.
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公开(公告)号：DE2919925A1
公开(公告)日：1980-11-20
申请号：DE2919925
申请日：1979-05-17
Applicant: ZEISS CARL FA
Inventor： MAECHLER MEINRAD , OBERMAYER HANS DR ING , STACKLIES HORST ING GRAD
Abstract: A device for photometric analysis of small specimen quantities measures the intensity of light affected by the specimen. It enables analysis of quantities of the order of micro-litres in a freely selected spectral region from ultraviolet to near infra-red. Rapid, highly reproducible intensity measurements are performed with minimal beam loading. The specimen is illuminated by a double monochromator consisting of two similar monochromator halves with opposite dispersions. Two freely movable slit jaws are placed in the double monochromator central plane to stop the spectral range of interest. The specimen is placed behind the exit opening of the aperture. Each monochromator half consists of a concave diffraction grid and a lens giving fault-free stigmatic spectrum imageing by concentrating the energy in first order diffractions.
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