A projection system that facilitates the use of in-situ detection of a change in wavelength, thereby enabling appropriate compensation or corrections to be applied on the fly to improve the quality of the image in the primary image region. In-situ detection in this manner can allow wavelength changes due to both temperature fluctuations and hardware variations to be compensated for simultaneously, thereby reducing the time and expense for end of line hardware testing, and removing the need to perform in-situ mapping of the wavelength as a function of temperature. In this way, the quality of the image provided to a user can be improved in a simpler, more efficient manner.

An apparatus which analyses a depth of a holographic image is provided. The apparatus includes an acquisition unit that acquires a hologram, a restoration unit that restores a three-dimensional holographic image by irradiating the hologram with a light source, an image sensing unit that senses a depth information image of the restored holographic image, and an analysis display unit that analyzes a depth quality of the holographic image, based on the sensed depth information image, and the image sensing unit uses a lensless type of photosensor.

A real-time, in situ and automated technology and method for dynamic observation of airborne viruses has been developed, and its application for airborne viruses, using a model virus, MS2 bacteriophage, and SARS-COV-1 RNA, has been demonstrated. There is described a method of performing measurements using a digital in-line holographic microscope (DIHM). The method generally has: propagating a light beam through a pinhole, across a medium including particles, and to a sensor; acquiring, with the sensor, a plurality of holograms, the holograms including scattering information of the particles; and determining, from a reconstruction of the holograms, at least one of shape, size, intensity and phase of the particles from the scattering information of said particles.

The invention concerns an optical system (10) comprising: a spatial light modulator (13) comprising an array of controllable elements adapted for generating a modulated light beam (17) by diffracting an incident light beam (12), the modulated light beam (17) comprising a modulated part and an unmodulated zero order part, the modulated part carrying an image to be projected into a replay volume (18), a control unit for applying a control signal to the controllable elements so as to control the modulated light beam (17) generated by the controllable elements, a perturbing optical element (30) for introducing optical aberrations in the incident light beam (12) and/or the modulated light beam (17) so as to spread the unmodulated zero order part of the modulated light beam in the replay volume (18), the perturbing optical element (30) generating distortions in the image to be projected, wherein the control signal comprises an image signal component carrying data representative of the image to be projected and a correction signal component representative of a correction pattern for correcting the distortions generated by the perturbing optical element (30) in the image to be projected.

An apparatus for hologram interaction is disclosed. A method and system also perform the functions of the apparatus. The apparatus includes an identification module that identifies a first hologram being projected within a space. The first hologram is projected by a first system. The apparatus includes a projection module that projects a second hologram within the space. The second hologram projected by a second system. The apparatus includes a detection module that detects movement and position of the first hologram and an interaction module that controls position and movement of the second hologram to dynamically interact with the first hologram. The first hologram dynamically interacting with the second hologram includes reactions of the second hologram in response to the detected movement and the position of the first hologram.

A method and apparatus for measuring a quality of a holographic image are provided. An image quality measuring method may include acquiring a first image including a holographic image in a background, and a second image that does not include a holographic image, the first image and the second image being on the same background, extracting a gray level value and a dark-noise counted level value from the first image in a selected range of the first image, extracting a gray level value and a dark-noise counted level value from the second image in the same range as the selected range of the first image, and determining a holographic contrast ratio (HCR) of the holographic image based on the extracted gray level values and the extracted dark-noise counted level values.

A holographic projector comprising a spatial light modulator arranged to display a hologram of a light pattern for projection and to spatially-modulate light, in accordance with display, to form a holographic reconstruction, wherein the holographic reconstruction is spatially-separated from the spatial light modulator. If the holographic projection is operating properly, the formed holographic reconstruction should correspond to the light pattern. The holographic projector also comprises a detector array comprising a plurality of light detection elements arranged to detect light corresponding to a respective plurality of positions of the holographic reconstruction and to provide a respective plurality of output signals related to light detection, and a fault detection circuit arranged to compare one or more of the plurality of output signals from the respective plurality of light detection elements with one or more of a plurality of expected signals based on the light distribution of the light pattern.

Holographic operation equipment, including: a holographic image generating device configured to generate holographic image information including an operated object; an operation device configured to operate the operated object; an image transmitting device configured to transmit the holographic image information; and an information receiving device configured to receive a control signal and send the control signal to the operation device to control the operation of the operation device. The operation error resulted in panel displaying can be reduced. A holographic control equipment, a holographic operation method, a holographic control method and a telemedicine system are further provided.

An image display system is provided. The image display system includes: at least one holographic image acquiring device each configured to obtain holographic image information of a scene; an image synthesis device configured to generate holographic image synthesis information based on at least a part of the holographic image information obtained by the at least one holographic image acquiring device; and an image reconstruction device configured to reconstruct a holographic synthetic image in accordance with the holographic image synthesis information. The image display system can synthesize holographic image information to combine several holographic three-dimensional display scenes into one holographic three-dimensional scene, so that the user can perceive display effects almost the same as the real scenes, improving user experience. An image display method is also provided.

Information is recorded in quick response codes. A hologram is made from quick response codes and provides three dimensions of information in a two-dimensional hologram. The holograms are used for recording large amounts of information in two dimensions. Multiple quick response codes containing copious information are created using different light wave frequencies in different quick response encoders. The multiple quick response codes are combined in a two-dimensional hologram that is used on labeling. The hologram is read by a hologram reader. Each quick response frequency layer is separated from the hologram. The quick response code is extracted from each layer. A quick response reader provides the information that has been recorded.