The present invention relates to an inspection system and more particularly to a system and method for inspection of wet ophthalmic lens, preferably in an automated lens manufacturing line. The inspection system provides for capturing multiple images of an ophthalmic lens using multiple cameras, each with a customized optical unit which may use wavelength filters, and the ophthalmic lens illuminated by multiple lighting modules each configured for a different wavelength, or a different polarization and triggered to strobe the illumination at the same instance or at different instances in the time domain. Suitable filters used in the optical module for each camera ensures appropriate images at different illuminating wavelength, especially when all the illuminations are strobed at the same time. Images captured and inspected by this configuration aids in improvement in method of inspection with enhanced degree of reliability and quality.

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.

Techniques are described for inspecting optical devices, such as eyepieces, to determine whether they exhibit light leakage through an edge sealant that has been applied to the device. Embodiments provide an inspection apparatus that can be employed to detect the leakage of light through an edge sealant of an optical device, where the edge sealant is applied to prevent, or at least reduce, the leakage of light from the optical device. Light from a light source is projected into the optical device. The light can travel along one or more wave guides within the device, until reaching an edge of the device. Light that is able to leak through an edge sealant can be reflected, using mirror(s) in the apparatus, and detected by a camera. Image(s) captured by the camera can be analyzed to determine the performance of the optical device with respect to edge leakage.

An assembly includes an optical element having a light-shaping region. A light emitter is aimed into the optical element along an internal reflective path. The internal reflective path extends across the light-shaping region. A photodetector is positioned along the internal reflective path. Integrity of the optical element is determined based on detection of light from the light emitter along the internal reflective path by the photodetector.

Quality control of an electrochromic device is described. A method may be subsequent to a stage of manufacturing of an electrochromic device. The method may include directing a current tinting state of the electrochromic device to correspond to a first tinting state and receiving sensor data associated with the directing of the current tinting state of the electrochromic device to correspond to the first tinting state. The method may further include determining, based on the sensor data, whether a corrective action is to be performed for the electrochromic device and, responsive to determining the corrective action is to be performed, cause the corrective action to be performed.

An additive manufacturing machine includes a laser light source, a beam entry window, a recoater, a plurality of light sources attached to the recoater, a photosensor, and a controller. The laser light source emits laser light to selectively melt one or more portions of a working layer of a powder bed during additive manufacturing of a part. The beam entry window is positioned between the powder bed and the laser light source. The recoater moves across the powder bed to spread the working layer. The photo sensor senses intensity of light emitted by each of the plurality of light sources through the beam entry window. The controller correlates sensed intensity of the light emitted by each of the plurality of light sources through the beam entry window to corresponding positions on the beam entry window based on locations of each of the plurality of light sources.

A method implemented by computer means for determining at least one optical parameter of a lens of eyewear adapted for a person, the method comprising: an image reception step, during which at least a first image and a second image are received, the first image comprising a front view of the face of the person with at least one part of an eye of the person being directly visible, and the second image comprising a front view of the face of the person with said part of the eye of the person being visible through at least part of the lens, and an optical parameter determination step, during which at least one optical parameter of the lens is determined based on a comparison between said part on the first and the second image.

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.

Conventionally, eyewear is rated in terms of its absorption coefficient (sometimes called the optical density (OD)) or the protection that it provides from ultraviolet (UV) radiation, which can damage the eye at high enough power levels. Infrared (IR) radiation can also damage the eye, but IR damage tends to occur at a much slower rate than UV-induced damage. Rating eyewear in terms of protection from IR radiation and/or in terms of a maximum safe exposure duration (SED) to IR radiation improves consumers' ability to protect themselves from IR radiation. In addition, eyewear rated for more IR protection or longer SED may still provide excellent vision thanks to coatings that reflect or absorb IR light and transmit visible light.

Disclosed are a transmittance measuring method, which includes the following operations: acquiring the initial transmittance of a polarizer to be measured at a measuring point; acquiring a transmittance correction value corresponding to the measuring point; determining the transmittance of the polarizer to be measured according to the initial transmittance and the transmittance correction value corresponding to the measuring point.