Fujifilm Corporation

Nanchang O-film Optical-electronic Tech Co., Ltd.

Kazuyoshi Okada

Yasunobu Kishine

Atsushi Kawanago

Yuya Hirakawa

Takashi Kunugise

Michio Cho

Taro Asami

Kenkichi Hayashi

Shuji Ono

Masaru Amano

Yukiko Nagatoshi

Masao Mori

Ukyo Tomioka

Masaru Yonezawa

Toshihiro Aoi

Yasutaka Shimada

Shunsuke Miyagishima

Ping Sun

An imaging method of imaging a subject through a multispectral camera including a processor, includes: causing the processor to perform: a data acquisition step of acquiring first spectral data of a first subject, second spectral data of a second subject, and third spectral data of a third subject; a wavelength selection step of selecting a plurality of wavelengths from a wavelength region of the acquired first to third spectral data, the wavelength selection step being for determining, as a computational amount, a difference or a ratio between feature amounts of two pieces of spectral data, from among the first spectral data, the second spectral data, and the third spectral data, and obtaining computational amounts to select the plurality of wavelengths; and an imaging step of imaging a subject including at least one of the first subject, the second subject, or the third subject at the plurality of wavelengths.

Imaging method and program

An optical member includes aperture regions, a lens device, and an imaging apparatus. A lens device includes: an imaging optical system; a first polarizing part that polarizes at least a part of rays transmitted through the imaging optical system; and a filter unit that is disposed at a pupil position of the imaging optical system or near the pupil position, and includes aperture regions transmitting the rays of the imaging optical system and including a first aperture region and a second aperture region, wavelength selective filters disposed in the first aperture region and the second aperture region and transmitting pieces of light of which at least a part of wavelength ranges are different from each other, and a second polarizing filter including polarizing filters disposed in the first aperture region and the second aperture region and having polarization directions different from each other.

Optical member, lens device, and imaging apparatus

A lens device and an imaging apparatus that can emit illumination light coaxial with a lens optical system are proposed herein. A lens device includes an optical system that includes a first lens and a second lens forming an optical image of a subject; a first optical member that includes a frame that includes a plurality of aperture regions, a plurality of optical filters that include two or more optical filters transmitting lights having at least some wavelength ranges different from each other, and a plurality of polarizing filters that have different polarization directions; and a second optical member that is provided outside the optical system and closer to a subject side than the first optical member and emits illumination light, which is incident from the outside of the optical system, to the subject side via the optical system.

Lens device and imaging apparatus

An imaging device, an adjustment method, and an adjustment program can acquire multispectral images having good image quality. The imaging device is disposed on an image side of another optical system, and includes a multispectral camera that acquires images in a plurality of wavelength ranges, a field lens that relays the other optical system to the multispectral camera, and an adjustment mechanism that adjusts a conjugate relationship between an emission pupil position of the other optical system and an incident pupil position of the multispectral camera. The multispectral camera includes: a wavelength polarizing filter unit that includes an optical member disposed at a pupil position or near the pupil position and including a plurality of aperture regions having different centroids, a plurality of optical filters arranged in the aperture regions, and a plurality of polarizing filters arranged in the aperture regions; an imaging element; and a processor.

Imaging device, adjustment method, and adjustment program

There are provided a lens device, an imaging apparatus, and an imaging method that suppress the occurrence of overexposure by dimming or blocking totally reflected light. The lens device () includes: an optical system (A); a wavelength polarizing filter unit () that is disposed at a pupil position of the optical system (A) or near the pupil position and includes a plurality of aperture regions, a plurality of optical filters that are disposed in the plurality of aperture regions and include two or more optical filters transmitting lights having a part of wavelength ranges different from each other, and a plurality of first polarizing filters that are disposed in the plurality of aperture regions and are at least two first polarizing filters having polarization directions different from each other; and a first circularly polarizing optical element () that is provided between a subject and the wavelength polarizing filter unit.

Lens device for forming image, and imaging apparatus and imaging method with lens device

Provided are an imaging apparatus and a method capable of capturing a high-quality multi spectral image. The imaging apparatus includes: an optical system that has three or more aperture regions at a pupil position or near the pupil position, each of the aperture regions being provided with a different combination of a polarizing filter and a bandpass filter such that the aperture region transmits light having a combination of a different polarization angle and a different wavelength range; an image sensor in which three or more types of pixels that receive light having different polarization angles are arranged two-dimensionally; and a processor that performs interference removal processing on a signal output from the image sensor and generates an image signal for each of the aperture regions. In a case where the optical system has three or more types of the polarizing filters and the polarizing filters are arranged in an order of the polarization angles, at least one of differences in the polarization angles of the adjacent polarizing filters is different from the others.

Imaging apparatus and method

Provided are an image processing device, an imaging element, an image processing method, and an image processing program that satisfactorily generate a plurality of polarized image data from polarized image data acquired from an imaging element. A processor (B) of an image processing device () performs an acquisition process of acquiring first image data from an imaging element () in which four first-polarizers having different polarization directions are regularly provided on pixels arranged in a two-dimensional manner, a first polarized image data generation process of performing a demosaicing process on the first image data to generate four pieces of first polarized image data having different polarization directions, and a second polarized image data generation process of generating four or less pieces of second polarized image data by using the four pieces of first polarized image data and a relationship between the polarization directions of the four first-polarizers stored in the memory (C).

Image processing device, imaging device, image processing method, and image processing program

A lens device includes an imaging optical system and an optical member. The optical member is disposed near a pupil of the imaging optical system in a state where an optical axis of the optical member coincides with an optical axis of the imaging optical system. The optical member includes a frame that includes a plurality of aperture regions, a plurality of optical filters that are disposed in at least one of the plurality of aperture regions and include two or more optical filters transmitting light having at least some wavelength ranges different from each other, and a plurality of polarizing filters that are disposed in at least one of the plurality of aperture regions and have different polarization directions. The lens barrel has a slit, and the optical member is insertable into and removable from the imaging optical system through the slit.

Lens device, imaging apparatus, imaging method, and imaging program for acquiring multispectral images

Provided are an imaging device which can simultaneously capture images in different wavelength ranges and can improve a focusing accuracy of each image, an imaging optical system, and an imaging method. An imaging device () includes an imaging optical system () which has a first pupil region for passing light in a first wavelength range and a second pupil region for passing light in a second wavelength range, in which an axial chromatic aberration of the imaging optical system () is reduced based on a relationship between an aberration other than the axial chromatic aberration of the imaging optical system () and positions of the first pupil region and the second pupil region in the imaging optical system (), an imaging element () which includes a first pixel receiving the light passing through the first pupil region in the imaging optical system () and a second pixel receiving the light passing through the second pupil region in the imaging optical system (), and a signal processing unit () which processes a signal output from the imaging element (), and generates each of a first image of the first wavelength range and a second image of the second wavelength range based on an output signal of the first pixel and an output signal of the second pixel.

Imaging device, imaging optical system, and imaging method

One embodiment according to the technology of the present disclosure provides an optical element, an optical device, and an imaging apparatus, which can acquire a multispectral image having a good image quality. An optical element according to one aspect of the present invention includes: a frame having a plurality of aperture regions; and a plurality of optical filters that are mounted in the plurality of aperture regions, the plurality of optical filters including at least two types of filters having different wavelength ranges of transmitted light, and centroids of at least two types of aperture regions coincide with each other.

Optical element, optical device, and imaging apparatus for acquiring multispectral images

Provided are a lens device, an imaging apparatus, an optical member, an imaging method, and an imaging program that are used to acquire multispectral images having a good image quality. According to one aspect, a lens device includes: an imaging optical system that includes a lens forming an optical image of a subject; and an optical member that is disposed near a pupil of the imaging optical system in a state where an optical axis of the optical member coincides with an optical axis of the imaging optical system, and includes a frame that includes a plurality of aperture regions, a plurality of optical filters that are disposed in at least one of the plurality of aperture regions and include two or more optical filters transmitting light having at least some wavelength ranges different from each other, and a plurality of polarizing filters that are disposed in at least one of the plurality of aperture regions and have different polarization directions. The amount of light emitted from the imaging optical system is changeable in the plurality of aperture regions.

Lens device, imaging apparatus, optical member, imaging method, and imaging program for acquiring multispectral images

Provided is an imaging apparatus that captures a multispectral image having a good image quality. An imaging apparatus () includes an imaging optical system () that includes a pupil region which is split into a plurality of regions including a first pupil region and a second pupil region different from the first pupil region, and a polarization filter which polarizes light beams passing through the first pupil region and the second pupil region in directions different from each other, an imaging element () that includes a first pixel which receives the light beam passing through the first pupil region and a second pixel which receives the light beam passing through the second pupil region, and a signal processing unit () that processes signals output from the imaging element (), and outputs at least first image data consisting of an output signal of the first pixel and second image data consisting of an output signal of the second pixel. In the imaging optical system (), wavelengths of the light beams passing through the first pupil region and the second pupil region are different from each other, and aberration characteristics of regions corresponding to the first pupil region and the second pupil region are different from each other.

Imaging apparatus

Provided is an imaging apparatus that captures a multispectral image of four bands or more. An imaging apparatus () includes an imaging optical system (), an image sensor (), and a signal processing unit (). The imaging optical system () includes a bandpass filter unit () of which at least one of aperture regions transmits light beams of a plurality of wavelength ranges, and a polarization filter unit () that polarizes the light beams transmitted through the bandpass filter unit () in a plurality of directions, in a vicinity of a pupil thereof. The image sensor () receives light beams transmitted through a plurality of types of spectral filter elements and a plurality of types of polarization filter elements. The signal processing unit () processes signals output from the image sensor () to generate a plurality of image signals. In the imaging apparatus (), the number of transmission wavelength ranges of at least one of the aperture regions of the bandpass filter unit () is equal to or less than the number of transmission wavelength ranges of the spectral filter element.

Frame body for use in an optical member of a lens for a camera

The optical system having an imaging lens that images a first-plane and a second-plane which are discontinuous includes: a first-optical-system that images the first-plane; a second-optical-system that images the second-plane; and a common-optical-system that forms a subject image, which is incident through the first-optical-system, on the first-light-receiving-region of the image sensor and forms a subject image, which is incident through the second-optical-system, on the second-light-receiving-region of the image sensor. In the optical system, an angle of view, at which imaging is performed by the first-optical-system and the common-optical-system, overlaps with an angle of view, at which imaging is performed by the second-optical-system and the common-optical-system. The optical system includes a first focus adjustment unit that adjusts the focus of the optical system composed of the first-optical-system and the common-optical-system and a second focus adjustment unit that adjusts the focus of the optical system composed of the second-optical-system and the common-optical-system.

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Saitama, Japan

Kazuyoshi Okada