The present disclosure describes an optical module. The optical module includes a housing comprising a first portion, a second portion, and protrusions, and the protrusions are configured to enclose the first portion to isolate the first portion from the second portion. The optical module includes a circuit board disposed inside the housing, the circuit board comprising a first area, a second area, and a metal strip attaching to the protrusions. The optical module further includes an indicator light configured to emit light and a laser driving chip. The first area of the circuit board is electrically connected to the indicator light to supply power to the indicator light. The second area of the circuit board is electrically connected to the laser driving chip. The metal strip encloses the first area to isolate the first area from the second area.

A privacy film may have a light-blocking layer that is interposed between first and second transparent substrates. The light-blocking layer may have a plurality of opaque portions and a plurality of transparent portions. The opaque portions may be shaped to ensure light from the display is directed only to the primary viewer of the display. Each opaque portion of the light-blocking layer may extend along a respective longitudinal axis between the first and second transparent substrates. Privacy films used to cover curved displays may have opaque portions that extend along longitudinal axes that have different angles relative to the transparent substrates. Opaque portions in the edge of the privacy film may have longitudinal axes that are at non-perpendicular angles with respect to the transparent substrates. A privacy film for a curved display may also include a light-redirecting layer such as a prism layer or a liquid crystal layer.

A headlamp is disclosed with a lamp fitted with a light source; a headband allowing the fastening of the headlamp over the head of a user, where the headband has a constant length, symmetrical with respect to a median sagittal plane. The headband also has an alternation of rigid/semi rigid elements for allowing a deformation in the space and the adjustment on the user's head is presented. In addition, the headband has a rigid/semi-rigid front section allowing a certain deformability along a first plane (x, y), a rigid/semi-rigid intermediate section allowing a certain deformability along a second plane (x, z) and a rigid/semi-rigid rear section allowing a certain deformability along a third plane (y, z). The headband has elements for the attachment and the passage of an elastic link for constraining the deformation of the rigid/semi rigid headband within the three planes.

An apparatus including a light conversion element including an input interface for receiving input light; an output interface for providing output light having at least one different, lower frequency than the input light; and a plurality of light guides extending between the input interface and the output interface that suspend down-conversion material at remote locations from the input interface, wherein the down-conversion material is configured to down-convert the received input light to produce the provided output light of lower frequency or frequencies.

The invention provides a lighting module (100) which comprises a plurality of first light sources (101) configured for emitting first light (102) in a first predetermined direction, and at least one second light source (103) configured for emitting second light (104). The lighting module (100) further comprises a light guide (105) which comprises at least one light in-coupling portion (106) to couple at least part of the second light (104) into the light guide (105), and a plurality of light out-coupling portions (107) to couple at least part of the second light (104) out of the light guide (105). The light guide (105) is arranged to guide the second light (104) coupled into the light guide (105) at the at least one light in-coupling portion (106) via total internal reflection (108) to the plurality of light out-coupling portions (107) for generating out-coupled light in a second predetermined direction. The light guide (105) is mechanically coupled to and extends along the plurality of first light sources (101). The light out-coupling portions (107) cover a larger first area (109) than a second area (110) covered by the plurality of first light sources (101). A total luminous flux generated by the at least one second light source (103) is lower than a total luminous flux generated by the plurality of the first light sources (101). The first predetermined direction and the second predetermined direction at least partly overlap.

An optical scanning system adapted to scan a sample on a chip is provided. The optical scanning system includes at least one optical scanning head, at least one scanning light source, a light receiving device and a processor. Each of at least one optical scanning head includes a focusing light source, a first optical guiding structure, and a control unit. The first optical guiding structure is configured to guide the focusing light emitted from the focusing light source to travel to the sample, and the first optical guiding structure is configured to guide the at least one scanning light emitted from the at least one scanning light source to the sample to generate a secondary light. The control unit is configured to control the first optical guiding structure to keep the focusing light and at least one scanning light focusing on a surface of the chip. The light receiving device receives the secondary light and generates a scanning electronic signal. The processor is electrically coupled to the light receiving device to dispose the scanning electronic signal.

A radar system for detecting objects can comprise an RF transmitter that emits RF light and at least one light source that emits visible light in response to the RF light detecting the presence of an object. The system can include a dielectric lens that collects and focuses the RF light. The dielectric lens can also include features that collect and scatter the visible light.

A privacy film may have a light-blocking layer that is interposed between first and second transparent substrates. The light-blocking layer may have a plurality of opaque portions and a plurality of transparent portions. The opaque portions may be shaped to ensure light from the display is directed only to the primary viewer of the display. Each opaque portion of the light-blocking layer may extend along a respective longitudinal axis between the first and second transparent substrates. Privacy films used to cover curved displays may have opaque portions that extend along longitudinal axes that have different angles relative to the transparent substrates. Opaque portions in the edge of the privacy film may have longitudinal axes that are at non-perpendicular angles with respect to the transparent substrates. A privacy film for a curved display may also include a light-redirecting layer such as a prism layer or a liquid crystal layer.

12. A lighting device comprising a lighting module including an optical output configured to emit a light beam having an angular spread is disclosed. The module has a light source configured to generate the light beam and an optical diffuser arranged to receive and diffuse the beam towards the optical output, such that the downstream value (.sub.2) is greater than the upstream value (.sub.1) of the angular spread. A control module emits a control signal having an alarm value when the value of the angular spread of the light beam emitted by the optical output passes below a first threshold, the control module comprising a photoreceptor optically coupled to the optical output and configured to measure a light intensity. The control module outputs the control signal having the alarm value when the value of the light intensity falls below a second threshold. A control circuit deactivates the light source upon reception of the control signal having the alarm value.

A concealed light fixture sign includes a flange having stencil openings formed therein that define a message. A container extends from a rear surface of the flange and provides light through the stencil openings. The container is configured to be installed completely within a recess behind a mounting surface with the flange positioned substantially flush with the mounting surface. Translucent inserts positioned within the stencil openings are removable to provide access to an interior of the container after installation of the light fixture sign.