Provided are a near-infrared absorbing photosensitive composition including at least one oxocarbon compound selected from a compound represented by Formula (SQ1) or a compound represented by Formula (CR1), a polymerizable compound, a photopolymerization initiator, and a solvent; a cured film formed of the near-infrared absorbing photosensitive composition; an optical filter; a method for forming a pattern; a laminate; a solid-state imaging element; an image display device; and an infrared sensor. In Formula (SQ1), Rs.sup.1 and Rs.sup.2 each independently represent a monovalent organic group. In Formula (CR1), Rc.sup.1 and Rc.sup.2 each independently represent a monovalent organic group. ##STR00001##

Provided are a near-infrared absorbing photosensitive composition including at least one oxocarbon compound selected from a compound represented by Formula (SQ1) or a compound represented by Formula (CR1), a polymerizable compound, a photopolymerization initiator, and a solvent; a cured film formed of the near-infrared absorbing photosensitive composition; an optical filter; a method for forming a pattern; a laminate; a solid-state imaging element; an image display device; and an infrared sensor. In Formula (SQ1), Rs.sup.1 and Rs.sup.2 each independently represent a monovalent organic group. In Formula (CR1), Rc.sup.1 and Rc.sup.2 each independently represent a monovalent organic group. ##STR00001##

An optical lens system includes, in order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, an IR band-pass filter, wherein a stop is disposed before an object-side surface of the first lens or between an image-side surface of the first lens and an object-side surface of the second lens, a distance from the stop to an image plane along the optical axis is TSI, a distance from the object-side surface of the first lens to the image plane along the optical axis is TL, a distance from an image-side surface of the sixth lens to the image plane along the optical axis is BFL, a focal length of the optical lens system is f, following condition is satisfied: 0.25 mm.sup.−1<TL/((TSI−BFL)*f)<0.49 mm.sup.−1.

A six-piece optical image capturing system is disclosed. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power, and a sixth lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens of the optical image capturing system can increase aperture value and improve the imagining quality for use in compact cameras.

A six-piece optical image capturing system is disclosed. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power, and a sixth lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens of the optical image capturing system can increase aperture value and improve the imagining quality for use in compact cameras.

Certain examples relate to a terrestrial terahertz imaging system. In one example, the terrestrial terahertz imaging system has an imaging assembly to form a first image of at least a portion of an object using electromagnetic radiation in a terahertz band of frequencies and a receiver assembly comprising a cryostat. The cryostat contains a detector and reflective cold re-imaging optical components to receive the electromagnetic radiation from the imaging assembly. The reflective cold re-imaging optical components form a second image of at least a portion of the object on the detector. The imaging assembly has reflective optical components arranged in a confocal configuration that is arranged to image at finite conjugates. The reflective cold re-imaging optical components implement a reflective, confocal optical relay. Other examples relate to body and vehicle scanning devices that may be used in security applications.

A hyperspectral camera based on a continuously variable film filter and a coating method thereof can solve interference between partial bands of the hyperspectral camera based on the continuously variable film filter. The hyperspectral camera includes: a camera body and a detector chip, wherein a continuously variable film is coated on the detector chip; a semi-transmission half-cut filter is provided in front of the continuously variable film, and a distance between the semi-transmission half-cut filter and the continuously variable film is 0 mm. According to the present invention, the semi-transparent half-cut filter and the detector chip are integrated without any gap therebetween. As a result, optical interference caused by incident light sequentially passing through the semi-transparent half-cut filter and the detector chip is greatly reduced, which can reduce distortion of spectral signals, and finally satisfy wide-band application requirements which can be truly realized based on such technology.

An electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from an outside to an inside, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an outside surface being convex in a paraxial region thereof. The second lens element has an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being concave in a paraxial region thereof, wherein at least one of an outside surface and the inside surface of the fourth lens element includes at least one critical point in an off-axis region thereof.

An electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from an outside to an inside, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an outside surface being convex in a paraxial region thereof. The second lens element has an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being concave in a paraxial region thereof, wherein at least one of an outside surface and the inside surface of the fourth lens element includes at least one critical point in an off-axis region thereof.

Some embodiments are directed to a wide-field imaging system for the infrared spectral range. The system can include a vacuum chamber that is optically open for the passage of the field rays originating from the scene to be imaged, a cooled dark chamber placed inside the vacuum chamber and provided with a cold diaphragm, an infrared detector placed inside the cooled dark chamber, and a device for optically conjugating the field rays with the detector.