One embodiment of the invention provides a pattern generation device includes a light source, a first HPDLC cell, and a second HPDLC cell. The first HPDLC cell is disposed downstream of a light path of the light source and contains a first phase modulation pattern. The second HPDLC cell is disposed downstream of the light path of the first HPDLC cell and contains a diffraction grating pattern.

An optical guide has at least two diffraction gratings in serial in front of a light source in order to diffract a light beam from the light source twice. The first diffraction grating could split the light beam into several parallel light beams along a first axis, and the second diffraction grating could split the light beams into several points of light along a second axis, and so on and so forth. By rotating the diffraction gratings relative to one another and by adjusting the distance between the diffraction gratings, a user of the optical guide could adjust the angle of the axis points and adjust a relative distance of the points of light relative to one another. These light beams could provide convenient guides for users in a variety of applications.

A pointing system including: a pointing device including an operation portion and a light-emitting portion that emits light according to an operation to the operation portion; and a control device including an image pickup portion that picks up light from the light-emitting portion when the light-emitting portion emits light and outputs an image including information on a light spot of the light, a display portion that includes a screen and displays a pointer on the screen, and a control portion that judges, as well as judge a movement of the light spot based on the information on the light spot in the image and move the pointer on the screen based on the movement of the light spot, whether the light spot is turned off based on the information on the light spot in the image and executes processing related to a click when the light spot is turned off.

Apparatus and associated methods relate to a graveside communications device exchanging multimedia between a grave and a user's communications device remote from the grave, activating an energy emitter configured by the graveside device to physically interact with the grave responsive to the remote user's activity, and sending to the user's communication device a live indication of the interaction. In an illustrative example, the device at the grave may include a video camera. The user's device may be configured to exchange multimedia with the graveside device. In some examples, the energy emitter may be a laser pointer directed at the grave. The remote user's activity may be, for example, the user1 s voice captured by the user's smartphone modulating the laser pointer light. Various examples may advantageously provide graveside telepresence, permitting a user physical interaction with a grave, and providing live indication of the interaction to the user.

An optical beam shaping unit for shaping a beam bundle. The optical beam shaping unit has at least one ball lens for shaping the beam bundle, wherein the ball lens allows a large portion of the light incident on the ball lens to pass through, and wherein the optical beam shaping unit has at least one optical unit which has a positive effective focal length and which is arranged in a beam path with the ball lens.

An optical beam shaping unit for shaping a beam bundle. The optical beam shaping unit has at least one ball lens for shaping the beam bundle, wherein the ball lens allows a large portion of the light incident on the ball lens to pass through, and wherein the optical beam shaping unit has at least one optical unit which has a positive effective focal length and which is arranged in a beam path with the ball lens.

An optical warning illumination device includes a light pattern generator for generating and projecting a light pattern on the ground. The light pattern is comprised of a plurality of images. The device includes a mounting member for mounting the light pattern generator to a vehicle and to position the light pattern generator with respect to the vehicle. The device includes a controller for controlling the operation of the light pattern generator.

A light source system and a laser light source (300). The laser light source includes two groups of laser groups (20a, 20b), wherein at least one group of laser groups includes at least two lasers (21a, 21b, 21c, 21d), and the light beams (L1) generated by the two groups of laser groups are in the same direction and parallel to each other. The first projections of the two groups of laser groups on the cross section of the light beams formed by the respective emergent light rays thereof are partially overlapped with the second projections in a first direction, which first direction is the connection direction of at least two laser centers of a group of laser groups.

The present invention provides an optical film comprising a substrate including a photoluminescent material and an adhesive layer formed on one surface of the substrate. The optical film according to the present invention can not only enhance the visibility of a laser pointer when the laser pointer is pointed on a display having the optical film adhered thereto, but also suppresses the generation of bubbles when adhered to an antiglare-treated display having fine asperities on its surface to prevent the deterioration of visibility, and can also have an excellent transmissive clarity and be easily attached and detached.

The present invention provides an optical film comprising a substrate including a photoluminescent material and an adhesive layer formed on one surface of the substrate. The optical film according to the present invention can not only enhance the visibility of a laser pointer when the laser pointer is pointed on a display having the optical film adhered thereto, but also suppresses the generation of bubbles when adhered to an antiglare-treated display having fine asperities on its surface to prevent the deterioration of visibility, and can also have an excellent transmissive clarity and be easily attached and detached.