An optical receiving module may include: a light transmitting body configured to transmit light; a light incidence part through which light is incident into the light transmitting body; and a plurality of reflectors configured to reflect the light incident from the light incidence part a plurality of times, such that the light is incident toward a light receiver unit.

The present disclosure relates to a coaxial four-reflection optical system with visible light long-wave infrared common-aperture imaging, and belongs to the technical field of optical systems. The technical problems that the axial length compactness and the imaging quality of the visible light/infrared composite imaging system in the existing technology need to be improved are solved. The optical system of the present disclosure includes a main reflecting mirror, a first transmitting mirror, a third reflecting mirror, a fourth reflecting mirror, a second transmitting mirror, a third transmitting mirror and a fourth transmitting mirror. The optical system has a visible light panchromatic imaging function, a visible light multispectral imaging function and a long-wave infrared imaging function, which lowers the requirement of a space remote sensor for ground illumination conditions, realizes all-time space optical remote sensing reconnaissance and dynamic monitoring, and greatly improves the functional density and cost performance of a space optical load. The optical system has a compact structure, low distortion and good stray light inhibition, and is convenient to process, assemble and adjust.

A multi channel beamsplitter system operating over a wide spectral band has high optical performance despite the fact that the incoming and/or exiting light is not collimated and its material is dispersive. This is achieved using wavefront compensators that are matched to the curvature of the wavefronts of the incoming and/or exiting light.

A system for outputting partially spatially coherent light to an imaging system is disclosed herein, which includes a spatially coherent light source configured to output a spatially coherent signal, at least one optical device having an optical device body with a first device surface formed thereon and configured to reflect a portion of the spatially coherent signal to form at least one coherent reflected signal. The optical device body also includes a second device surface having one or more surface irregularities configured to diffuse a portion of the spatially coherent light source output signal transmitted through the optical device body, to produce at least one spatially incoherent signal. The combination of the coherent reflected signal and the spatially incoherent signal form the partially spatially coherent light signal.

Provided is a reflective optical element that is lightweight and excellent in damping capacity. In the reflective optical element, a resin layer having an optical surface is formed on a metal substrate, and a reflective film is formed on the optical surface, and also, the metal substrate includes an alloy containing Mg as a main component.

A non-linear optical pumping detection apparatus and a non-linear optical absorption cross-section measurement method, which can simultaneously measure degenerate and non-degenerate two-photon absorption cross-section spectra. The measurement process is automatic, efficient and fast. The working wavelength band is from 380 nm to near infrared 1064 nm, and the non-linear performance measurement of the super-continuous wide spectra can be realized. A zoom optical system with a larger entrance pupil diameter is adopted as a weak signal acquisition lens. So the weak signal can be effectively extracted from background noise. Meanwhile, the mean square root diameter of an on-axis image point of the zoom optical system is 100 to 150 microns, the divergence angle 2α of the on-axis image point is 30.6 degrees, which well match the optical fiber coupling condition, thereby improving the coupling efficiency of the space light coupling into the optical fiber, and greatly improving the measurement sensitivity.

Relay systems may be incorporated into optical systems to direct light from at least one image source to a viewing volume. Light from a plurality of image sources may be directed by relay systems to a viewing volume. Some light from the plurality of image sources may be occluded by an occlusion system to reduce undesirable artifacts in when the relayed light from the plurality of image sources are observed in the viewing volume.

A lens device includes a first lens module, a first light path turning module and an image sensor. The first lens module, the first light path turning module and the image sensor are sequentially arranged along a light path in which a light beam propagates. The first light path turning module is configured to change a direction in which the light beam propagates so that the light beam passes through the first lens module to form an image on the image sensor.

An optical apparatus includes a deflection unit configured to deflect illumination light from a light source and to deflect reflected light from the object, and a light guide unit configured to guide the illumination light to the deflection unit and to guide the reflected light from the deflection unit to a light receiving unit. The light guide unit includes first and second passage areas, and a reflective area. The illumination light is branched into first and second illumination lights by the light guide unit. The first illumination light is emitted from the first passage area and the second illumination light is emitted from the second passage area so that an emission direction of the first illumination light and that of the second illumination light are not parallel to each other, and then the first illumination light and the second illumination light enter the deflection unit.

A flat-plate lens and an optical imaging system are provided. The flat-plate lens, includes a first face and a second face, the first face includes a ring-shaped light-transmitting region and a first reflective region surrounded by the ring-shaped light-transmitting region, and the second face includes an imaging region and a second reflective region surrounding the imaging region. The second reflective region is configured to reflect light to the first reflective region, and the first reflective region is configured to reflect light to the imaging region; the second reflective region includes a first mirror. The first mirror is one selected from the group consisting of a free-form curved mirror, an aspheric mirror and a spherical mirror, and the first reflective region includes at least one selected from the group consisting of a free-form curved mirror, an aspheric mirror, a spherical mirror and a plane mirror.