A laser beam (L50) generated by a laser light source (50) is reflected by a light beam scanning device (60) and irradiated onto a hologram recording medium (45). On the hologram recording medium (45), an image (35) of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin (B). The light beam scanning device (60) bends the laser beam (L50) at the scanning origin (B) and irradiates the laser beam onto the hologram recording medium (45). At this time, scanning is carried out by changing a bending mode of the laser beam with time so that an irradiation position of the bent laser beam (L60) on the hologram recording medium (45) changes with time. Regardless of an irradiation position of the beam, diffracted light (L45) from the hologram recording medium (45) produces a reproduction image (35) of the scatter plate on the spatial light modulator (200). The modulated image of the spatial light modulator (200) is projected onto a screen (400) by a projection optical system (300).

Techniques for creating, configuring, and employing diffusion light devices are presented. Such light device(s) can comprise or be associated with a light management component (LMC) that can employ sensors to monitor environmental conditions in a defined area of people or vehicles, and a diffusion component that can diffuse or otherwise process light. At a least a portion of the diffusion component and/or a light component can be formed of a fabric that can emit light and/or diffuse light. LMC can enhance function of the light device to manage diffusion of light or perform other tasks to enhance user experience and safety and security of people or vehicles. Based on results of analyzing sensor data relating to the conditions, LMC can determine and facilitate implementing an adjustment(s) to a parameter(s) of the diffusion component or light component to achieve desired emission or diffusion of light.

In various embodiments, an optical unit is provided. The optical unit includes a first optics element which act as a lens and is made of silicone, and a second optics element. The second optics element is arranged in the first optics element that is formed from an at least one of harder or stiffer material as compared to the first optics element.

An electronic device and a control method therefor are provided. The electronic device includes a main lens, an image sensor, and at least one processor. When an input for acquiring an image is received, the at least one processor is configured to acquire, from the at least one main lens, a first image including an object by setting the image sensor to a first position corresponding to a first focal point for the object, acquire, from the at least one main lens, a second image including the object by setting the image sensor to a second position corresponding to a second focal point for the object, and combine the acquired first image and the acquired second image to generate a combined image. The first focal point and the second focal point are positions symmetrical to each other with reference to an on-focus position for the object.

A color separation device changes a light path according to the wavelengths of incident light and an image sensor has improved light utilization efficiency by using the color separation device. The color separation device may include a first element having a first refractive index that varies according to wavelengths of light along a first refractive index distribution curve, and a second element having a second refractive index that varies according to wavelengths of light along a second refractive index distribution curve, the second refractive index distribution curve being different from the first refractive index distribution curve. The color separation device may be manufactured by simply joining two elements, namely, the first and second elements, together and thus may be more easily manufactured and perform more effective color separation.

The spatial phase modulation element is a so-called grating light valve for modulating the phase of light by displacing the ribbons. If the measurement light beam Lm (measurement light) is incident on such a spatial phase modulation element, the measurement light beam Lm is emitted in a direction corresponding to the displacement mode of the ribbons. That is, an emission direction of the measurement light beam Lm can be changed, and the measurement light beam Lm can be scanned across the object J by controlling the displacement mode of the ribbons. At this time, the measurement light beam Lm phase-modulated by the spatial phase modulation element is projected to the object J after being shaped into a linear beam. That is, the linear measurement light beam Lm is scanned across the object J.

An image displayed on an image display unit is illuminated by an image illumination unit, and the image is displayed for a driver using a display optical system having at least one concave mirror element. The image illumination unit has a light emitting surface that emits an illumination light, and a lens array that divides and focuses an entrance pupil of an eye box onto the light emitting surface. With the above configuration, since the light emitting surface and the eye box have a conjugate relationship through the lens array and the display optical system, the light emitted from the light emitting surface can efficiently reach the eye box. As a result, since the light can be efficiently used for illumination, the image having high luminance can be displayed without any increase in the luminance of a light source and any reduction in the number of displayable colors.

Portable corneal topographers and portable corneal topographer modules are disclosed. In one embodiment, a corneal topographer module comprises a housing having a first aperture and a second aperture formed therethrough; and a plurality of optical components disposed within the housing. The plurality of optical components are arranged to direct light generated by a light source through the first aperture to the cornea via a first optical channel when a cornea of a patient's eye is located adjacent to the first aperture; and direct reflected light from the cornea into the housing through the first aperture and to a light detector of a mobile device via a second optical channel when the corneal topographer module is mechanically coupled to the mobile device.

Optical films are disclosed. More particularly, optical films including a collimating reflective polarizer are disclosed. The optical films are useful in backlights, and in particular backlight recycling cavities. Constructions suitable with both edge-lit and direct-lit backlights are disclosed.

Disclosed is an electronic device. In the electronic device according to the present disclosure, a central axis of a viewing angle based on an eye of a user and the central axis of the viewing angle based on a lens optical axis of a camera match each other. An electronic device according to the present disclosure may be associated with an artificial intelligence module, robot, augmented reality (AR) device, virtual reality (VR) device, and device related to 5G services.