Abstract: An optical filter includes: a dielectric multilayer film 1; a glass substrate; a dielectric multilayer film 2; a light-absorbing layer; and a dielectric multilayer film 3 in this order, in which the light-absorbing layer comprises a near-infrared ray absorbing dye, and the optical filter satisfies all of spectral characteristics (i-1) to (i-6).

Abstract: An optical filter includes: a dielectric multilayer film 1; a light-absorbing layer; a glass substrate; and a dielectric multilayer film 2 in this order, in which the dielectric multilayer film 1 has a thickness of 1,500 nm or more, the light-absorbing layer includes a resin having a glass transition temperature of 200° C. or higher and a near-infrared ray absorbing dye, and the optical filter satisfies spectral characteristics (i-1) and (i-2).

Abstract: An optical filter according to an embodiment includes: a dielectric multilayer film 1; a light-absorbing layer; a glass substrate; and a dielectric multilayer film 2 in this order, in which the light-absorbing layer includes a near-infrared ray absorbing dye, and the optical filter satisfies all of spectral characteristic (i-1) to spectral characteristic (i-6).

Abstract: An optical filter includes a first dielectric multilayer film, a resin film, a phosphate glass, and a second dielectric multilayer film. The second dielectric multilayer film includes at least one H2 layer satisfying a refractive index of 1.8 or more and 2.5 or less and a QWOT of 1.1 or more and 3.5 or less, when a layer closest to the phosphate glass in the H2 layers is defined as a first H2 layer, the second dielectric multilayer film comprises a first M2 layer comprising a single layer satisfying a QWOT of 1.2 or more and 1.8 or less or a plurality of layers satisfying a total QWOT of 1.2 or more and 1.8 or less between the first H2 layer and the phosphate glass, and the optical filter satisfies all of the spectral characteristics (i-1) to (i-4).

Abstract: An optical filter includes: a substrate, an antireflection layer 1 including a dielectric multilayer film laminated on one main surface side of the substrate, and an antireflection layer 2 including a dielectric multilayer film laminated on the other main surface side of the substrate. The substrate includes a near-infrared ray absorbing glass and a resin film, the resin film includes a resin, a UV dye having a maximum absorption wavelength in 350 nm to 410 nm in the resin, and an IR dye having a maximum absorption wavelength in 700 nm to 850 nm in the resin, and the optical filter satisfies all of the characteristics (i-1) to (i-7).

Abstract: An optical filter includes: a dielectric multilayer film 1; a substrate comprising a near-infrared ray absorbing glass and a resin film; and a dielectric multilayer film 2 in this order. The resin film comprises a near-infrared ray absorbing dye and a resin, the near-infrared ray absorbing glass is a fluorophosphate glass containing P, Cu, and F, and the optical filter satisfies all of the spectral characteristics (i-1) to (i-3), (i-5), and (i-13).

Abstract: An optical filter includes a glass substrate having a first main surface and a second main surface opposite each other and including phosphoric acid glass, a first antireflective layer disposed directly or indirectly on the first main surface of the glass substrate, and a resin layer, containing dye, disposed as one or more layers directly or indirectly on the second main surface of the glass substrate, wherein the glass substrate includes a predetermined range of amount of oxides, wherein the dye has a maximum absorption wavelength in the resin layer at a wavelength range of 690 to 800 nm, wherein thickness of the resin layer is 10 ?m or less, wherein the optical filter has all spectral characteristics specified in (a-1) to (a-6), and wherein a Haze value of the optical filter is 2% or less.

Abstract: An optical filter includes a glass substrate having a first main surface, a second main surface opposite the first main surface, and an end surface connecting the first and second main surfaces, the glass substrate being a phosphate glass containing an absorbent, and a first antireflection layer disposed directly or indirectly on the first main surface of the glass substrate, wherein the first main surface of the glass substrate is coated with a first inorganic film, and a second inorganic film is provided directly or indirectly on the second main surface of the glass substrate, with the end surface being coated with a third inorganic film, and wherein the first inorganic film is a film that is closest to the glass substrate among films constituting the first antireflection layer, or a film that is different from a film composed of a plurality of films constituting the first antireflection layer.

Abstract: An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-3), (i-6) to (i-8), and (i-10) to (i-13).

Abstract: An optical filter includes: an absorber including an inorganic material including ytterbium; an absorption layer including a dye and a resin, the dye having a maximum absorption wavelength between 350 nm and 1,200 nm; and a dielectric multilayer film. The absorber may have a flat plate shape, and the absorber may have a thickness of 3 mm or less.

Abstract: The present invention pertains to an optical filter including: a light-absorbing material Y900-1000 having a maximum absorption wavelength in a wavelength region of 900 nm to 1,000 nm, and a dielectric multilayer film, in which the optical filter satisfies all of spectral characteristics (i-1) to (i-6), and the optical filter may satisfy spectral characteristic (i-7).

Abstract: An optical filter includes: a light-absorbing material X800S having a maximum absorption wavelength in a wavelength region shorter than 800 nm; a light-absorbing material Y850L having a maximum absorption wavelength in a wavelength region longer than 850 nm; and a dielectric multilayer film, in which the optical filter satisfies spectral characteristics (i-1) to (i-5).

Abstract: An optical filter, includes: a substrate, a diciectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (1-5), (i-7) to (i-10), (i-12) and (i-14).

Abstract: A processing unit classifies multiple images taken inside a subject's body into multiple groups based on a certain criterion. The processing unit distinguishably displays images in the multiple groups.

Abstract: An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-3), (i-6) to (i-8), and (i-10) to (i-13).

Abstract: An image group specifying unit specifies one or more image groups including a plurality of lesion image showing a lesion from among a plurality of images acquired during examination. A display control unit displays the plurality of images included in the image groups at a first display frame rate and displays a plurality of images not included in the image groups at a second display frame rate higher than the first display frame rate. The display control unit may display only some of the plurality of images not included in the image groups and hide the rest of the images.

Abstract: An optical filter includes: a substrate; a dielectric multilayer film (I) laid on or above one main surface of the substrate; and a dielectric multilayer film (II) laid on or above the other main surface of the substrate, in which the substrate includes a near-infrared ray absorbing glass and a resin film, the resin film includes a resin and a dye (NIR1), and the optical filter satisfies specific spectral characteristics.

Abstract: An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-5), (i-7) to (i-10), (i-12) and (i-14).

Abstract: An optical filter includes: a substrate; and a dielectric multilayer film (A) laid on or above at least one main surface of the substrate as an outermost layer, the dielectric multilayer film (A) being configured to reflect a light in a wavelength region of 900 nm or more, in which the substrate includes a resin film including a resin and a dye (I) having a maximum absorption wavelength of 700 nm to 800 nm in the resin, the optical filter transmits a visible light and a light in at least a partial wavelength region of 750 nm to 1000 nm, and the optical filter satisfies all of spectral characteristics (i-1) to (i-9).

Abstract: An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-7).