The imaging optical system forms a first intermediate image at a position conjugate to the magnification side imaging surface and a second intermediate image at a position closer to a reduction side than the first intermediate image on an optical path and conjugate to the first intermediate image. The imaging optical system consists of a first optical system, a second optical system, and a third optical system in order from a magnification side to the reduction side along the optical path. The imaging optical system is configured to be telecentric on the reduction side. The imaging optical system satisfies predetermined conditional expressions.

This application provides an image processing method and an image collection device. A haze intensity of a first image is calculated. When the haze intensity of the first image is greater than a first threshold, control information is sent, where the control information is used to control a haze penetration optical component to move into a lens. Because the haze penetration optical component can improve quality of optical imaging, the lens into which the haze penetration optical component is moved has a function of optical haze penetration. It can be learned that, when the haze intensity of the first image is greater than the first threshold, the function of the optical haze penetration is enabled, so as to improve quality of an image obtained in a haze environment.

This application provides an image processing method and an image collection device. A haze intensity of a first image is calculated. When the haze intensity of the first image is greater than a first threshold, control information is sent, where the control information is used to control a haze penetration optical component to move into a lens. Because the haze penetration optical component can improve quality of optical imaging, the lens into which the haze penetration optical component is moved has a function of optical haze penetration. It can be learned that, when the haze intensity of the first image is greater than the first threshold, the function of the optical haze penetration is enabled, so as to improve quality of an image obtained in a haze environment.

In some aspects, an afocal adaptor for an optical device comprises a housing. The housing includes a first and a second optical channel. A divider is configured between the first optical channel and the second optical channel to prevent transmission of electromagnetic radiation between the first optical channel and the second optical channel. At least one lens is associated with each of the first optical channel and the second optical channel. A particular at least one lens is configured to provide a focal point for each of the first optical channel and the second optical channel and to guide a particular type of electromagnetic radiation through each of the first optical channel and the second optical channel. The electromagnetic radiation is guided into a corresponding first receiving optical channel and a second receiving optical channel associated with the optical device. A coupling mechanism is attached to the housing and configured to permit attachment of the housing to the optical device.

In some aspects, an afocal adaptor for an optical device comprises a housing. The housing includes a first and a second optical channel. A divider is configured between the first optical channel and the second optical channel to prevent transmission of electromagnetic radiation between the first optical channel and the second optical channel. At least one lens is associated with each of the first optical channel and the second optical channel. A particular at least one lens is configured to provide a focal point for each of the first optical channel and the second optical channel and to guide a particular type of electromagnetic radiation through each of the first optical channel and the second optical channel. The electromagnetic radiation is guided into a corresponding first receiving optical channel and a second receiving optical channel associated with the optical device. A coupling mechanism is attached to the housing and configured to permit attachment of the housing to the optical device.

A mid-wave infrared (MWIR) discrete zoom lens for use with remote surveillance and identification having a dual focal length of 9 and 6.39 inches and F #2.8 and F #2, respectively. In one case, a full field of view is about 30.8 degrees for a 9 inch focal length configuration and about 43 degrees for a 6.39 inch focal length configuration. The lens is corrected for monochromatic and chromatic aberrations over the wavelength range 5100 nm-3300 nm. The focal plane may constitute a pixel array consisting of MWIR sensitive material (e.g. InSb, HgCdTe, nBn, SLS, etc.) for use in high-resolution, wide-area imaging applications.

A mid-wave infrared (MWIR) discrete zoom lens for use with remote surveillance and identification having a dual focal length of 9 and 6.39 inches and F #2.8 and F #2, respectively. In one case, a full field of view is about 30.8 degrees for a 9 inch focal length configuration and about 43 degrees for a 6.39 inch focal length configuration. The lens is corrected for monochromatic and chromatic aberrations over the wavelength range 5100 nm-3300 nm. The focal plane may constitute a pixel array consisting of MWIR sensitive material (e.g. InSb, HgCdTe, nBn, SLS, etc.) for use in high-resolution, wide-area imaging applications.

The invention provides a system (1) comprising a sensor (100) for measuring a skin parameter, the sensor (100) comprising (i) a plurality of spatially separated light sources (110) configured to provide light source light (111), and (ii) a detector (120) configured at a first distance (d1) from each of the light sources (110), wherein the first distance (d1) is selected from the range of 5-80 mm, wherein the sensor (100) is configured to provide the light source light (111) with optical axes (OL) under an angle () relative to an optical axis (O2) of the detector (120) selected from the range of 10-80, wherein the sensor (100) comprises at least three light sources (110), wherein the light sources (110) are configured to provide unpolarized light source light (111), wherein the sensor (100) further comprises (iii) a sensor opening (107) downstream of the light sources (110) and upstream of the detector (120) for propagation of the light source light (111) out of the sensor (100) and for entrance of reflected sensor light (111) into the sensor (100), and (iv) a sensor window (150), of a material (151) transmissive for the light source light (111), configured downstream of the light sources (110), configured upstream of the sensor opening (107), and configured upstream of the detector (120) with a second distance (d2) to the sensor opening (107) of at least 3 mm.

A varifocal lens includes a first phase plate and a second phase plate which are rotatable relative to each other about an optical axis. The first phase plate includes a plurality of first phase conversion elements, the second phase plate includes a plurality of second phase conversion elements, and the plurality of first phase conversion elements and the plurality of second phase conversion elements are arranged so that light transmitted through the first phase plate and the second phase plate is focused on different positions on the optical axis depending on a relative rotational displacement between the first phase plate and the second phase plate.

A varifocal lens includes a first phase plate and a second phase plate which are rotatable relative to each other about an optical axis. The first phase plate includes a plurality of first phase conversion elements, the second phase plate includes a plurality of second phase conversion elements, and the plurality of first phase conversion elements and the plurality of second phase conversion elements are arranged so that light transmitted through the first phase plate and the second phase plate is focused on different positions on the optical axis depending on a relative rotational displacement between the first phase plate and the second phase plate.