A photoelectric sensor includes: a placement table configured to allow a workpiece to be placed thereon; a light projecting device including a light emitting element configured to emit light and a converging element configured to converge the light emitted from the light emitting element toward a detection area; and a light receiving device configured to receive the light passing through the detection area from the converging element at a position located on a same plane as the placement table in a direction along an optical axis of the light. The optical axis of the light projected from the light projecting device is set such that the light is incident in a direction perpendicular to an incident surface of the light receiving device and focused on the incident surface of the light receiving device.

A method and a device for detecting a focal position of a laser beam, particularly a machining laser beam in a laser machining head, includes an optical element which is arranged in the laser beam converging toward the focal point and which is designed to outcouple a reflection from the laser beam path, and a sensor arrangement which is designed to detect beam characteristics of said laser beam in the region of the focal point in the laser extension direction, and which measures the outcoupled reflection of the laser beam at at least two locations that are offset to one another in the extension direction, in order to determine the current focal position.

The present disclosure relates to an image sensor. The image sensor includes a substrate and a photodetector in the substrate. The image sensor further includes an absorption enhancement structure. The absorption enhancement structure is defined by a substrate depression along a first side of the substrate. The substrate depression is defined by a first plurality of sidewalls that slope toward a first common point and by a second plurality of sidewalls that slope toward a second common point. The first plurality of sidewalls extend over the second plurality of sidewalls.

The present invention provides an asymmetric optical sensor device comprising: a light emitting unit for outputting light; a light receiving unit which receives the light reflected by an external object, and consists of a plurality of pixels which correspond to regions of different angles with respect to the light emitting unit and are arranged in a row; and a lens unit for diffusing the light from the light emitting unit. The light amounts received by the plurality of pixels are light amount values which are asymmetric with respect to the center of the light receiving unit.

An optical system includes a laser source having an emission area that has a first width in a first direction and a first height in a second direction orthogonal to the first direction, the first width being greater than the first height. The optical system further includes a cylindrical lens having a negative power and positioned in front of the laser source. The cylindrical lens is oriented such that a power axis of the cylindrical lens is along the first direction. The cylindrical lens is configured to transform the emission area of a laser beam emitted by the laser source into a virtual emission area having a virtual width and a virtual height, where the virtual width is less than the first width. The optical system further includes an rotationally symmetric lens positioned downstream from the cylindrical lens and configured to collimate and direct the laser beam towards a far-field.

Methods and systems for determining one or more characteristics of light in an optical system are provided. One system includes first detector(s) configured to detect light having one or more wavelengths shorter than 190 nm emitted from a light source at one or more first angles mutually exclusive of one or more second angles at which the light is collected from the light source by an optical system for illumination of a specimen and to generate first output responsive to the light detected by the first detector(s). In addition, the system includes a control subsystem configured for determining one or more characteristics of the light at one or more planes in the optical system based on the first output.

An image following information detecting device capable of obtaining information for causing a central portion of an image to follow a line-of-sight of a user. The device includes: an image display system including an image light projecting unit , and a transmissive reflection member that reflects a part of the image light toward an eyeball and transmits other parts; and a line-of-sight detection system including at least one invisible light source, a diffractive optical element provided integrally with the transmissive reflection member and including a reflective diffraction portion that reflects and diffracts invisible light toward the eyeball,and a light receiving element that receives the invisible light reflected by the eyeball . A portion irradiated with a central portion of the image light of the transmissive reflection member and the reflective diffraction portion overlap each other when viewed from a thickness direction of the transmissive reflection member.

An optical sensing device includes a substrate; a light-sensing element disposed on the substrate; a light-shielding layer disposed on the light-sensing element, including a first opening overlapping the light-sensing element; an insulating layer disposed on the light-shielding layer, including a second opening overlapping the first opening; a light-shielding element disposed on a hole wall of the second opening; and a light-collecting element disposed on the insulating layer and overlapping the second opening.

A security light having optional connection to multiple power supplies. The lighting controller can sense the appropriate connected supply and automatically connect to three different power supplies which include house voltage connection through a typical junction box, a remote solar charging station, and on-board batteries that can be used as a third backup power supply. Additional implementations include power outage detection and backup illumination along with low voltage power supply from a mounting structure.

Apparatus for generating a laser line pattern for alignment, comprising of a collimated laser, a beam splitter, laser angular detection system, and a partially reflecting mirror equipped with a position detector on its back side. The laser beam is directed to the partially reflecting mirror, and the back reflection from said mirror is directed to an angular position aperture using a beam splitter. The angular position aperture will monitor the angle of reflection from said mirror as it moves along a path which its alignment accuracy is required. Moreover, said position detector mounted on partially reflecting mirror's back will monitor the position fluctuations in parallel to angular measurement performed by said angular measuring device. A method of generating a reference laser line is provided by a collimated laser, and deviations from laser beam path are recorded along a predeterminate section to yield position and angular behavior along the said predeterminate section.