The invention relates to an apparatus for protecting eyes from radiation, in particular for protecting the lenses of the eyes of medical personnel from x-ray radiation or other ionizing radiation during medical examinations. The apparatus is easy to handle and ensures shielding of the eyes from x-ray radiation, but nonetheless offers the best working and viewing conditions for the wearer. This is achieved by a housing made of a shell-type frame, which encloses the eye area and laterally the temples of the wearer, and a support device for placement on the head and with a nose rest for positioning on the bridge of the nose. The frame includes a frontal opening, in which a shield opaque to x-ray radiation is fitted, and at least one video playback device is arranged on the rear side of the shield, facing toward the eyes, inside the frame, and being coupled to an optical recording device or a camera, which is arranged on the side of the shield that faces away from the wearer.

The invention relates to an apparatus for protecting eyes from radiation, in particular for protecting the lenses of the eyes of medical personnel from x-ray radiation or other ionizing radiation during medical examinations. The apparatus is easy to handle and ensures shielding of the eyes from x-ray radiation, but nonetheless offers the best working and viewing conditions for the wearer. This is achieved by a housing made of a shell-type frame, which encloses the eye area and laterally the temples of the wearer, and a support device for placement on the head and with a nose rest for positioning on the bridge of the nose. The frame includes a frontal opening, in which a shield opaque to x-ray radiation is fitted, and at least one video playback device is arranged on the rear side of the shield, facing toward the eyes, inside the frame, and being coupled to an optical recording device or a camera, which is arranged on the side of the shield that faces away from the wearer.

A method to efficiently update and manage outputs of real time or offline 3D reconstruction and scanning in a mobile device having limited resource and connection to the Internet is provided. The method makes available to a wide variety of mobile XR applications fresh, accurate and comprehensive 3D reconstruction data, in either single user applications or multi-user applications sharing and updating the same 3D reconstruction data. The method includes a block-based 3D data representation that allows local update and maintains neighbor consistency at the same time, and a multi-layer caching mechanism that retrieves, prefetches, and stores 3D data efficiently for XR applications. Between sessions of an XR device, blocks may be persisted on the device or in remote storage in one or more cache layers. The device may, upon starting a new session, selectively use the blocks from one or more layers of the cache.

Embodiments generally relate to a machine-implemented method of automatically adjusting the range of a depth data recording executed by at least one processing device. The method comprises determining, by the at least one processing device, at least one positions of a subject to be recorded; determining, by the at least one processing device, at least one spatial range based on the positions of the subject; receiving depth information; and constructing, by the at least one processing device, a depth data recording based on the received depth information limited by the at least one spatial range.

Embodiments generally relate to a machine-implemented method of automatically adjusting the range of a depth data recording executed by at least one processing device. The method comprises determining, by the at least one processing device, at least one positions of a subject to be recorded; determining, by the at least one processing device, at least one spatial range based on the positions of the subject; receiving depth information; and constructing, by the at least one processing device, a depth data recording based on the received depth information limited by the at least one spatial range.

The invention relates to creating and viewing stereo images, for example stereo video images, also called 3D video. At least three camera sources with overlapping fields of view are used to capture a scene so that an area of the scene is covered by at least three cameras. At the viewer, a camera pair is chosen from the multiple cameras to create a stereo camera pair that best matches the location of the eyes of the user if they were located at the place of the camera sources. That is, a camera pair is chosen so that the disparity created by the camera sources resembles the disparity that the user's eyes would have at that location. If the user tilts his head, or the view orientation is otherwise altered, a new pair can be formed, for example by switching the other camera. The viewer device then forms the images of the video frames for the left and right eyes by picking the best sources for each area of each image for realistic stereo disparity.

The invention relates to creating and viewing stereo images, for example stereo video images, also called 3D video. At least three camera sources with overlapping fields of view are used to capture a scene so that an area of the scene is covered by at least three cameras. At the viewer, a camera pair is chosen from the multiple cameras to create a stereo camera pair that best matches the location of the eyes of the user if they were located at the place of the camera sources. That is, a camera pair is chosen so that the disparity created by the camera sources resembles the disparity that the user's eyes would have at that location. If the user tilts his head, or the view orientation is otherwise altered, a new pair can be formed, for example by switching the other camera. The viewer device then forms the images of the video frames for the left and right eyes by picking the best sources for each area of each image for realistic stereo disparity.

A recording material cooling device includes a belt, a plurality of rollers, a belt cooling member, a recording material feeding member, a deposited matter removing member, a deposited matter receiving container, a roller holding member, and a supporting member for supporting the roller holding member so as to be swingable between a first position where the belt and the recording material feeding member contact each other and a second position where the belt is spaced from the recording material feeding member. The supporting member supports the roller holding member so that a swing center is positioned on one end side with respect to a rotational axis direction of the rollers. The receiving container includes a wall surface portion for preventing overflow of the deposited matter received through an opening of the receiving container when the roller holding member is positioned in the second position.

A method is provided for detecting a composition of airborne particles. The method includes directing, with a pump, gas including particulate matter through a filter including an indicator dye. The method further includes causing a color change in the filter based on the particulate matter binding to the indicator dye. The method further includes transmitting, with an optical source, an optical signal at the filter. The method further includes detecting, with an imaging device, a reflected signal from the filter. The method further includes determining, with a processor, a value of a parameter of the particulate matter based on the color change, wherein the color change is based on the detected reflected signal.

A method is provided for detecting a composition of airborne particles. The method includes directing, with a pump, gas including particulate matter through a filter including an indicator dye. The method further includes causing a color change in the filter based on the particulate matter binding to the indicator dye. The method further includes transmitting, with an optical source, an optical signal at the filter. The method further includes detecting, with an imaging device, a reflected signal from the filter. The method further includes determining, with a processor, a value of a parameter of the particulate matter based on the color change, wherein the color change is based on the detected reflected signal.