A method includes receiving collimated light from an optical imaging system and dividing the received light into multiple bands of wavelength. Each band is refocused onto a corresponding diffraction grating having an amplitude function matched to a point spread function (PSF) of the optical imaging system. The light that is not filtered out by the diffraction grating is transmitted onto a corresponding pixel array. An image is reconstructed from data provided by the pixel arrays for each band. The intensity of light scattered by each diffraction grating may be detected, with the image being reconstructed as a function of an average value of detected intensity of scattered light used to scale the known zero-order mode profile, which is added to the image on the pixel array.

An imaging apparatus includes a first optical system, a first separation optical system that separates the light transmitted through the first optical system into the first wavelength range light and the second wavelength range light, a second optical system that transmits the first wavelength range light obtained by the first separation optical system, a third optical system that transmits the second wavelength range light obtained by the first separation optical system, a first image sensor that receives the first wavelength range light, a second image sensor that receives the second wavelength range light, and a first light source that emits the first wavelength range light, in which the first optical system emits the first wavelength range light emitted from the first light source to a subject, and transmits subject light including first wavelength range reflected light obtained by reflecting the first wavelength range light by the subject.

An image acquisition system includes: a first narrowband light source that emits first narrowband light for exciting a luminescent agent that exists in an observation target and emits light having a wavelength belonging to a visible light wavelength band; a second narrowband light source that emits second narrowband light in a wavelength band of ±30 nm of a peak light emission wavelength of the luminescent agent; a broadband light source that emits broadband light for illuminating the observation target; a first image sensor on which an image of light in a light emission wavelength band including a wavelength corresponding to light emitted from the luminescent agent is formed; and a second image sensor including one or more image sensors on which an image of light in a wavelength band other than the light emission wavelength band is formed.

A system, method, and computer program product for generating a digital image is disclosed. In use, a first image and a second image are received from a first image sensor, where the first image sensor detects wavelengths of a visible spectrum. A third image and a fourth image are received from a second image sensor, where the second image sensor detects wavelengths of a non-visible spectrum. Using an image processing subsystem, a resulting image is generated by combining one of the first image or the second image, with one of the third image or the fourth image.

The pixel unit includes a base, the base being provided with an installation space; a photodiode, the photodiode being installed in the installation space, and the photodiode including a red photodiode, a green photodiode, and a blue photodiode that are spaced from each other; and an optical splitter, the optical splitter being installed on the base, at least part of the optical splitter being located in the installation space, the optical splitter having a light-in surface, a first light-out surface, a second light-out surface and a third light-out surface, and the optical splitter being configured to disperse light entering the light-in surface and then emit the light from the first light-out surface, the second light-out surface and the third light-out surface, where the first light-out surface faces the red photodiode, the second light-out surface faces the green photodiode, and the third light-out surface faces the blue photodiode.

The pixel unit includes a base, the base being provided with an installation space; a photodiode, the photodiode being installed in the installation space, and the photodiode including a red photodiode, a green photodiode, and a blue photodiode that are spaced from each other; and an optical splitter, the optical splitter being installed on the base, at least part of the optical splitter being located in the installation space, the optical splitter having a light-in surface, a first light-out surface, a second light-out surface and a third light-out surface, and the optical splitter being configured to disperse light entering the light-in surface and then emit the light from the first light-out surface, the second light-out surface and the third light-out surface, where the first light-out surface faces the red photodiode, the second light-out surface faces the green photodiode, and the third light-out surface faces the blue photodiode.

An image sensor assembly includes at least one upconverter configured to detect light in a NIR waveband that is received from an object to be imaged and generate, based on the detected light, upconverted light that is outside of the NIR waveband; and at least one image sensor configured to detect the upconverted light.

A dual-aperture zoom camera comprising a Wide camera with a respective Wide lens and a Tele camera with a respective Tele lens, the Wide and Tele cameras mounted directly on a single printed circuit board, wherein the Wide and Tele lenses have respective effective focal lengths EFL.sub.W and EFL.sub.T and respective total track lengths TTL.sub.W and TTL.sub.T and wherein TTL.sub.W/EFL.sub.W>1.1 and TTL.sub.T/EFL.sub.T<1.0. Optionally, the dual-aperture zoom camera may further comprise an optical OIS controller configured to provide a compensation lens movement according to a user-defined zoom factor (ZF) and a camera tilt (CT) through LMV=CT*EFL.sub.ZF, where EFL.sub.ZF is a zoom-factor dependent effective focal length.

An imaging system and a method of creating composite images are provided. The imaging system includes one or more lens assemblies coupled to a sensor. When reflected light from an object enters the imaging system, incident light on the metalens filter systems creates filtered light, which is turned into composite images by the corresponding sensors. Each metalens filter system focuses the light into a specific wavelength, creating the metalens images. The metalens images are sent to the processor, wherein the processor combines the metalens images into one or more composite images. The metalens images are combined into a composite image, and the composite image has reduced chromatic aberrations.

The present invention provides a technique of reducing colored afterimages. To solve this problem, an image capturing system includes the following structure: A color separation optical system disperses subject light into a plurality of wavelength ranges, and forms images of a plurality of color components. A plurality of image capturing elements capture the respective images of the plurality of color components, and generate the respective color components of a video signal. A color-specific exposure setting unit sets respective exposure periods for the plurality of color components. An exposure control unit performs exposure control α of approximately simultaneously exposure-controlling each of the plurality of image capturing elements to obtain a video signal (hereafter referred to as a reference video signal) in a common period shorter than or equal to a shortest period of the respective exposure periods set for the color components. The exposure control unit also performs exposure control β of exposure-controlling each of the plurality of image capturing elements to obtain a video signal (hereafter referred to as an extended video signal) in a period obtained by subtracting the common period from an exposure period of a corresponding color component.