Abstract:
An in-line laser beam waist analyzer system includes an optical prism that picks off a portion of a second surface reflection from either a laser processing focus lens or a protective debris shield for the processing lens and directs that focused light to a pixelated detector. This provides real time monitoring of the focused laser beam while it is processing material by welding, cutting, drilling, scribing or marking, without disrupting the process.
Abstract:
An in-line laser beam waist analyzer system includes an optical prism that picks off a portion of a second surface reflection from either a laser processing focus lens or a protective debris shield for the processing lens and directs that focused light to a pixelated detector. This provides real time monitoring of the focused laser beam while it is processing material by welding, cutting, drilling, scribing or marking, without disrupting the process.
Abstract:
A sensing device includes a housing and an image sensing system disposed in the housing and used for detecting a reflected light from an object. The image sensing system includes a substrate, a light sensing element, and a reflection and redirection element. The light sensing element is disposed on the substrate. The reflection and redirection element is disposed between the light sensing element and the object, and used for reflecting and redirecting the reflected light from the object to a receiving direction of the light sensing element, such that the light sensing element receives the reflected light and generates a corresponding sensing signal.
Abstract:
A controllable light angle selecting device (100) is provided. It comprises a fixed light selecting means (110) adapted to transmit light incident thereon within a limited acceptance angle, optically connected to at least one light redirecting means (120) capable of obtaining a variable angular difference between light entering said light redirecting means (120) and light exiting said light redirecting means. A photometer, comprising a controllable light angle selector arranged in the path of light between a light source and a light measuring sensor is also provided.
Abstract:
The invention relates to an optical waveguide device for monitoring a characteristics of light, e.g. a wavelength. The device incorporates a waveguide, such as an optical fiber, with an embedded tilted Bragg grating operating in a regime of wavelength detuning. The grating is designed to disperse light azimuthally in two or more different directions about the fiber axis, said directions changing with wavelength. A photodetector array is provided for detecting the azimuthal distribution of light. A processor coupled to the photodetector array determines wavelength information from the detected azimuthal distribution of the out-coupled light.
Abstract:
An omnidirectional photodetector has a prism and a light-detecting device. The prism has a cylindrical columnar body and a conical member disposed on an end of the columnar body and having a cross-sectional area that is progressively smaller toward a tip end of the conical member. The prism is made of a light-transmissive synthetic resin. When the omnidirectional photodetector is in use, the conical member is positioned above the columnar body and has its axis oriented vertically. The conical member has a conical surface as an outer circumferential surface thereof providing a reflecting surface for reflecting a light beam applied from an external source to the conical surface into the columnar body and downwardly toward the lower end of the columnar body.
Abstract:
An optical bandpass separator and systems based thereon split target and continuum band signals. The separator includes a first optical path for selectively transmitting a target band signal. The first optical path includes a first prism and a first bandpass filter. The separator includes a second optical path non-overlapping with the first optical path for transmitting a continuum band signal. The second optical path includes a second prism and a second bandpass filter. The spacing of the first and second optical paths allows the simultaneous and separate imaging or detection of the target band signal and the continuum band signal using a single imager or detector.
Abstract:
A light receiving module and a light receiving method to reduce polarization dependence, used in evaluation of polarization characteristics of various optical parts. The light receiving module has an optical mechanism including a first light transmission plate and a second light transmission plate between a first lens and a second lens, and a light receiving element of the outside of the optical mechanism. The first light transmission plate is inclined at such an angle as to have the same value as polarization dependence due to the inclination of the light receiving surface of the light receiving element, and subsequently the first light transmission plate is rotated by 90° in relation to the optical axis.
Abstract:
The light receiving module has an optical mechanism 18 including a first light transmission plate 14a and a second light transmission plate 15a between a first lens 12 and a second lens 16, and a light receiving element 13 of the outside of the optical mechanism 18. The light receiving element 13 is placed adjacent to the first light transmission plate 14a with the second lens 12 sandwiched, and the light receiving element 13 is placed with a light receiving surface 13b inclined with respect to an optical axis of incident light 11a. In the optical mechanism 18, the first light transmission plate 14a is inclined at such an angle as to have the same value as polarization dependence due to the inclination of the light receiving surface 13b of the light receiving element 13, and subsequently the first light transmission plate 14a is rotated by 90null in relation to the optical axis 11a. The second light transmission plate 15a is inclined at such an angle that the sum of the polarization dependence of the first transmission plate 14a and a polarization dependence of the second transmission plate 15a is equal to the polarization dependence due to the inclination of the light receiving surface 13b of the light receiving element 13 to cancel out the remaining polarization dependence, and subsequently the second light transmission plate 15a is rotated by 90null in relation to the optical axis 11a.
Abstract:
A photometer having asymmetrical apertures and with compensation for direction of incidence includes a photodetector, a mask having asymmetrical apertures and arranged before the photodetector and a compensation prism arranged either before or after the mask. The photometer is adapted to compensate for the difference in quantity of light incident on the photodetector caused by the mask depending on the difference in the direction of incidence of the light.