A projection position guiding method adapted to a projection system is provided. The projection system includes a projection target, an image capturing device and a projector. The projection position guiding method includes: projecting a projection content onto the projection target by the projector to generate a projection image, the projection content includes multiple positioning grid points arranged at intervals; capturing the projection target by the image capturing device to generate a captured image, and the captured image includes at least part of the projection image; and determining whether the positioning grid points satisfy multiple recognizable conditions according to the projection image in the captured image, when it is determined that the positioning grid points include at least one unrecognizable grid point that does not satisfy at least one of the recognizable conditions, adjusting a color of the at least one unrecognizable grid point in the projection content.

A projection apparatus, including an illumination system, a light valve, a first movable reflector, a first projection lens, a second projection lens, and a driving module, is provided. The illumination system is configured to provide an illumination light beam. The driving module is connected to the first movable reflector and is configured to drive the first movable reflector to move. The projection apparatus has a first projection mode and a second projection mode for being performed. In the first projection mode, the driving module controls the first movable reflector to move to a first position. In the second projection mode, the driving module controls the first movable reflector to move to a second position, and the first movable reflector is not located on a transmission path of an image light beam.

A system is provided for facilitating an enhanced video pipeline in order to improve color perception. The system comprises a first source configured to generate a first video stream, a second source configured to generate a second video stream, and a computing device. In this context, the computing device is configured to superpose the first video stream onto the second video stream, thereby generating an output video stream. The computing device is further configured to calculate weighting factors for individual pixels or discrete pixel sets of adjacent individual pixels of the output video stream by analyzing the first video stream and/or the second video stream.

A projection system according to an embodiment of the present technology includes an image formation apparatus, a projection lens, a measurement apparatus, a control apparatus, and a measurement assisting apparatus. The image formation apparatus forms image light. The projection lens projects the image light. The measurement apparatus measures the image light. The control apparatus controls the image formation apparatus on the basis of output of the measurement apparatus. The measurement assisting apparatus is disposed between the image formation apparatus and the projection lens and is configured to be capable of selectively switching between a first state to cause the image light to enter the projection lens and a second state to cause the image light to enter the measurement apparatus.

An object of the present invention is to provide a projection apparatus capable of appropriately performing control relating to a rotation state and/or a movement state of a projection lens. A projection apparatus according to an aspect of the present invention includes a housing; a light source; a control unit; and a projection lens attached to the housing, the projection lens having a holder, a detection unit that detects a rotation state of the holder, an emission optical system, and a locking mechanism unit that brings rotation of the holder into a locked state or an unlocked state. The projection lens is displaceable between a first position at which a rotation state of the holder is a housed state in which the emission optical system faces the housing and a second position at which the emission optical system does not face the housing by rotating the holder. The second position includes an upper position at which the emission optical system faces an upper side in a vertical direction. The control unit turns off the light source when a rotation state of the holder is the first position. The control unit turns on the light source when the rotation state of the holder is at the upper position. When the light source is turned on in the housed state in which the emission optical system faces the housing, the light emitted from the emission optical system hits the housing, and the temperatures of the projection lens and the housing may increase, which may cause an adverse effect. However, when the rotation state is the housed state, the control unit turns off the light source, thereby preventing the adverse effect.

An optical device includes a first waveguide having a first side and an opposing second side, a spatial light modulator configured to project image light, one or more lenses disposed between the spatial light modulator and the first waveguide, and a first in-coupler coupler coupled with the first waveguide. The spatial light modulator is positioned on the first side of the first waveguide. The first in-coupler is positioned to receive the image light projected by the spatial light modulator and transmitted through the one or more lenses and to redirect at least a first portion of the image light so that the first portion of the image light enters the first waveguide and undergoes total internal reflection inside the first waveguide.

An optical system includes a light source configured to emit irradiation light, an optical modulation element having a plurality of reflection planes by which an incident light is reflected in a different direction, and an optical element having an interface through which the irradiation light emitted from the light source is emitted to the optical modulation element as the incident light and a first exit light reflected by the optical modulation element in a first direction is guided to a projection surface. Each one of the plurality of reflection planes is inclined with reference to a surface of the optical modulation element to reflect the incident light as the first exit light, and the surface of the optical modulation element is inclined with reference to the interface.

A microscope system includes an eyepiece, an objective, a tube lens that is disposed between the eyepiece and the objective, a projection apparatus that projects a projection image onto an image plane on which an optical image is formed by the tube lens, and a processor that performs processes. The processes include performing for digital image data of the sample at least one analysis process selected from a plurality of analysis processes, and generating projection image data representing the projection image on the basis of the analysis result and the at least one analysis process. The projection image data indicates the analysis result in a display format including an image color corresponding to the at least one analysis process. The generating the projection image data includes determining a color for the projection image in accordance with the at least one analysis process selected from the plurality of analysis processes.

A liquid crystal projector includes a liquid crystal panel having a pixel circuit that modulates light based on video data corresponding to each of pixels, and a shift device configured to shift the modulated light by the pixel circuit so that a position of a projected pixel on a screen by the modulated light is shifted for each of the pixels, wherein the pixel circuit modulates n pixels of a first group, n being an integer of 2 or more, from among pixels of an image specified by video data in first frame period, and modulates n pixels of a second group in second frame period next to the first frame period, and the n pixels of the first group are different from the n pixels of the second group.

A projection apparatus includes a projection portion that performs irradiation with projection light, and a moving mechanism that moves a projection range of the projection light. In a state where the projection range is maintained, the projection apparatus displays an image showing a movement destination of the projection range in response to a first operation by the projection portion. The projection apparatus moves the projection range to the movement destination by the moving mechanism.