A system to inspect Dry Cosmetic contact lenses for defects such as imperfect structures, improper pattern prints, print smears, wrong colour, embedded foreign material or contaminants, wherein the said lens is printed with multilayers of ink on the anterior surface using at least one colourant and a binding polymer comprising: a) a Top camera to capture an image of the cosmetic lens; b) a Top illumination designed using IR wavelength LEDs positioned at an acute angle to the vertical axis and integrated with a lens system to produce a parallel and collimated illumination field; c) a bottom illumination designed using IR wavelength LEDs to illuminate the lens posterior; d) an optically transparent glass plate to accurately locate the lens at a predetermined position and also to diffuse the illumination; e) a contact lens under inspection placed on the transparent glass plate with its anterior surface facing the Camera and Top illumination; f) the Top and Bottom illumination designed using segmented LEDs arrangement, to provide programmable triggering of LED segments for intensity and trigger duration, dynamically.

This application relates to a device for measuring a transmittance curve of an Fabry-Perot using a frequency comb light source and a method using the same. The device includes the following components sequentially arranged in an optical path: a single frequency pulse laser generating single frequency pulse laser; a frequency comb laser converting received single frequency pulse laser into frequency comb laser; and an Fabry-Perot to be detected receiving laser output from the frequency comb laser; where the device further includes a first receiving unit receiving laser from an output end of the frequency comb laser and performing component and spectrum analysis, and a second receiving unit receiving laser from an output end of the Fabry-Perot to be detected and performing component and spectrum analysis.

An illumination device includes a box body, a LED module, and a light homogenizing plate. A variety of different color temperatures are set in different chips controlling the LEDs in the LED module. The homogenizing plate converts light, such that the illumination device can generate light beams of various color temperatures. The test requirements applicable to different lenses or in relation to different color temperatures of the same lens at different periods can thus be met.

A method of determining the transmittance of a contact lens (200) includes the steps of obtaining a measurement of a first intensity of electromagnetic radiation reflected by ocular surface (100) with an intensity measuring device (400), positioning the contact lens (200) in direct contact with the ocular surface (100), obtaining a measurement of a second intensity of electromagnetic radiation transmitted through the contact lens (200) that is reflected a region (110) of the ocular surface (100) that is covered by the contact lens (200) with the intensity measuring device (400); and calculating the transmittance using the measurements of the first intensity and the second intensity.

A method of determining the transmittance of a transparent article (250) includes the steps of obtaining a measurement of a first intensity of electromagnetic radiation reflected or emitted by reference surface (80) with an intensity measuring device (400), positioning the transparent article (250) over the reference surface (80), obtaining a measurement of a second intensity of electromagnetic radiation transmitted through the transparent article (250) that is reflected or emitted by a region (110) of the reference surface (80) that is covered by the transparent article (250) with the intensity measuring device (400); and calculating the transmittance using the measurements of the first intensity and the second intensity.

An optical inspection device includes: a wafer support unit configured to support a wafer in which a plurality of Fabry-Perot interference filter portions are formed, each of the plurality of filter portions in which a distance between the first mirror portion and the second mirror portion facing each other varies by an electrostatic force, the wafer support unit configured to support the wafer such that a direction in which the first mirror portion and the second mirror portion face each other follows along a reference line; a light emission unit configured to emit light to be incident on each of the plurality of filter portions along the reference line; and a light detection unit configured to detect light transmitted through each of the plurality of filter portions along the reference line. The wafer support unit has a light passage region that allows light to pass along the reference line.

An object is to provide a light intensity distribution measurement method and a light intensity distribution measurement apparatus that are capable of accurately measuring the intensity of light in each mode at each position of an optical fiber through which light is propagated in a plurality of modes. With a light intensity distribution measurement apparatus according to the present invention, a gain coefficient matrix is acquired in advance, which is constituted by Brillouin gain coefficients of propagation modes with predetermined optical frequency differences measured using a reference optical fiber that exhibits the same properties as a measurement-target optical fiber and that does not cause mode coupling, and the intensity distribution of light in each propagation mode in a lengthwise direction of the measurement-target optical fiber is calculated based on the gain coefficient matrix and a difference in light intensity before and after Brillouin amplification of the probe light emitted in a predetermined propagation mode at a predetermined optical frequency difference measured using the measurement-target optical fiber.

An object is to provide a propagation property analyzing apparatus that can alleviate the influence of an error caused by crosstalk, and accurately evaluate a few-mode optical fiber that multiplexes a plurality of modes, in a distributional and non-destructive manner. Provided is a propagation property analyzing apparatus that analyzes propagation properties of a few-mode optical fiber that multiplexes a plurality of modes, which is an optical fiber under test, in a lengthwise direction thereof, through Brillouin time domain analysis, the propagation property analyzing apparatus including: means for inputting probe light in a desired mode from a distal end of the optical fiber under test; means for inputting a light pulse that is in the desired mode and that has a frequency difference equivalent to a Brillouin frequency shift in the desired mode, relative to the probe light, from a proximal end of the optical fiber under test, as pump light corresponding to the probe light; and means for inputting a light pulse that is in another mode different from the desired mode and that has a frequency difference equivalent to a Brillouin frequency shift in the other mode, relative to the probe light, as secondary probe light corresponding to the probe light, from the proximal end of the optical fiber under test.

An illumination device includes a box body, a LED module, and a light homogenizing plate. A variety of different color temperatures are set in different chips controlling the LEDs in the LED module. The homogenizing plate converts light, such that the illumination device can generate light beams of various color temperatures. The test requirements applicable to different lenses or in relation to different color temperatures of the same lens at different periods can thus be met.

A method of optical device metrology is provided. The method includes introducing a first type of light into a first optical device during a first time period, the first optical device including an optical substrate and an optical film disposed on the optical substrate, the first optical device further including a first surface, a second surface, and one or more sides connecting the first surface with the second surface; and measuring, during the first time period, a quantity of the first type of light transmitted from a plurality of locations on the first surface or the second surface during the first time period, wherein the measuring is performed by a detector coupled to one or more fiber heads positioned to collect the light transmitted from the plurality of locations.