Techniques for reducing biofouling on optical equipment, using minimum power in a marine environment are provided. An example apparatus for reducing biofouling in a marine environment includes a housing including a cavity and a convex ultraviolet transparent window disposed over the cavity, an optical device disposed in the cavity and directed towards the convex ultraviolet transparent window, one or more ultraviolet light emitting diodes disposed in the cavity and directed toward the convex ultraviolet transparent window, and a controller operably coupled to the one or more ultraviolet light emitting diodes and configured to provide at least one lamp power function to the one or more ultraviolet light emitting diodes, wherein the at least one lamp power function is based on at least a flash power value, a flash duration, and a rest duration.

Multilayer optical film comprising at least a plurality of alternating first and second optical layers. Embodiments of the multilayer optical film are useful, for example, in UV-C shield, UV-C light collimator, and UV-C light concentrator applications.

An inactivating device includes: an ultraviolet light source to emit ultraviolet light, a main light-emission wavelength band of the ultraviolet light being at least partly included in a range from 200 nm to 230 nm inclusive; and an optical filter including a multilayer dielectric film, wherein with respect to the ultraviolet light incident at an incidence angle of 0 degrees, the optical filter has a band in which the ultraviolet light in a range of wavelengths from 190 nm to 235 nm inclusive is transmitted, and a wavelength λ5 at which transmittance of the optical filter indicates 5% is longer than or equal to 236 nm and shorter than 245 nm.

An extreme ultra violet (EUV) light source apparatus includes a metal droplet generator, a collector mirror, an excitation laser inlet port for receiving an excitation laser, a first mirror configured to reflect the excitation laser that passes through a zone of excitation, and a second mirror configured to reflect the excitation laser reflected by the first mirror.

A luminaire for irradiating a target such as a printed product with printed-on lacquer or the like. The luminaire has a plurality of semiconductor light sources, wherein at least two first semiconductor light sources form a first light source line oriented in a lateral direction and wherein at least two further semiconductor light sources form a second light source line oriented in the lateral direction. The luminaire also has a plurality of separate lenses for collimating and/or collecting light from the semiconductor light sources, wherein each of the light source lines is assigned to one of the lenses.

A vehicular lamp configured to radiate illumination light and measuring light toward a side in front of a vehicle includes a light source unit configured to emit visible light that becomes illumination light and measuring light, and the light source unit emits the illumination light and the measuring light while alternately switching the illumination light and the measuring light at a cycle in which at least the measuring light is not visually recognized by a driver.

Disclosed herein are embodiments of an illuminator for disinfecting a surface. The surface defines a first plane. The illuminator includes a line emitter configured to emit light in a continuous line along at least a portion of at least one edge of the surface. The light has a peak wavelength in a range of 100 nm to 400 nm. The illuminator also includes a curved reflector surface and an exit aperture defining a second plane transverse to the first plane. The line emitter is positioned between the curved reflector surface and the exit aperture, and the curved reflector surface is configured to redirect the light from the line emitter through the exit aperture across the surface.

Methods, devices and systems that allow three-dimensional printing of material with high resolution are described. One example system includes a two-photon polymerization (TPP) subsystem including a first light source coupled to an optical fiber positioned to deliver a first laser light to a scanning optical device, and an optical projection subsystem comprising a second light source configured to provide a second light to a digital projection device. A dichroic mirror is positioned to receive light corresponding to the first and the second light source, and an objective lens positioned to provide illumination to a target material for 3D printing. The dichroic mirror is configured to allow light from one of the light sources to pass therethrough to the objective lens, and to allow light corresponding to the other light source to be reflected towards the objective lens to enable simultaneous illumination of the target material.

A disinfection device includes: a container having a wall that defines a chamber for containing liquid therein; and a light source for transmitting disinfection light to the liquid. The light source is in a spatial relationship with the container so that a distance between the light source and the first light receiving surface of the liquid remains unchanged regardless of a volume of the liquid.

The present invention relates to an optical component and a transparent body used in the optical component. The optical component includes at least one optical element that radiates ultraviolet light, and a package that accommodates the optical element. The package includes a mounting substrate on which the optical element is mounted, and a transparent body that is bonded to the mounting substrate with an organic-based adhesive layer therebetween. The package has a structure in which the ultraviolet light is transmitted through the transparent body but not guided to the adhesive layer, and the ultraviolet light does not directly come into contact with the adhesive layer.