An athermalized Short-Wave InfraRed (SWIR) telephoto lens for a tracking camera having, in order, from a remote object to an image plane an aperture stop, a first optical element having a first element first surface radius of 23.21 mm, a first element second surface radius of 46.25 mm, a second optical element having a second element first surface radius of 22.72 mm, a second element second surface radius of 45.58 mm, a third optical element having a third element first surface radius of −56.85 mm, a third element second surface radius of 16.65 mm, where the lens is corrected over a spectral waveband of 1.5 μm to 1.6 μm from −10 C to +65 C, has a length from the first element to the camera of 88 mm, has a telephoto ratio of 0.367, has an F # of 24, and has a focal length of 240 mm.

An athermalized Short-Wave InfraRed (SWIR) telephoto lens for a tracking camera having, in order, from a remote object to an image plane an aperture stop, a first optical element having a first element first surface radius of 23.21 mm, a first element second surface radius of 46.25 mm, a second optical element having a second element first surface radius of 22.72 mm, a second element second surface radius of 45.58 mm, a third optical element having a third element first surface radius of −56.85 mm, a third element second surface radius of 16.65 mm, where the lens is corrected over a spectral waveband of 1.5 μm to 1.6 μm from −10 C to +65 C, has a length from the first element to the camera of 88 mm, has a telephoto ratio of 0.367, has an F # of 24, and has a focal length of 240 mm.

A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a refractive power having an object-side surface being convex near an optical axis, a second lens element with a positive refractive power, a third lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, large stop, short length and less distortion.

The technology provides a camera module cover that prevents infrared light from leaking into the lens of an adjacent camera. The camera module cover can be used with in-vehicle environments, such as the passenger area and truck, as well as other indoor locations and places where infrared illumination is co-located with an optical camera system. An infrared illuminator unit is positioned adjacent to the camera, for instance in such a way that infrared light is evenly distributed or diffused around the camera lens. The camera module cover has a surface that includes an infrared-transparent material to promote even distribution of the infrared light. To avoid leakage into the camera lens, an infrared-opaque or otherwise blocking material is disposed within the cover so as to be between the infrared illuminator unit and the camera lens. The infrared-transparent and infrared-blocking materials may be formed as a single part via double injection molding.

The technology provides a camera module cover that prevents infrared light from leaking into the lens of an adjacent camera. The camera module cover can be used with in-vehicle environments, such as the passenger area and truck, as well as other indoor locations and places where infrared illumination is co-located with an optical camera system. An infrared illuminator unit is positioned adjacent to the camera, for instance in such a way that infrared light is evenly distributed or diffused around the camera lens. The camera module cover has a surface that includes an infrared-transparent material to promote even distribution of the infrared light. To avoid leakage into the camera lens, an infrared-opaque or otherwise blocking material is disposed within the cover so as to be between the infrared illuminator unit and the camera lens. The infrared-transparent and infrared-blocking materials may be formed as a single part via double injection molding.

There are provided a lens having excellent mechanical strength, as well as an optical component employing the lens. The lens is a lens having a circular shape when viewed in a plan view, the lens having a thickness of not less than 1 mm and not more than 11 mm at a lens center, the lens having a lens diameter of not less than 2 mm and not more than 50 mm, the lens having a curvature of not less than −0.5 mm.sup.−1 and not more than 0.5 mm.sup.−1 at the lens center.

There are provided a lens having excellent mechanical strength, as well as an optical component employing the lens. The lens is a lens having a circular shape when viewed in a plan view, the lens having a thickness of not less than 1 mm and not more than 11 mm at a lens center, the lens having a lens diameter of not less than 2 mm and not more than 50 mm, the lens having a curvature of not less than −0.5 mm.sup.−1 and not more than 0.5 mm.sup.−1 at the lens center.

An integrated optical assembly comprises an optics mount, an optical element comprising material that is optically transparent, the optical element molded in the optics mount, and an optical aperture wherein the optical aperture is secured in fixed position with respect to the optics mount and the transparent optical element.

An IR camera includes: a thermal radiation capturing arrangement for capturing thermal radiation of an imaged view in response to input control unit(s) receiving user inputs from a user of the IR camera; a processing unit arranged to process the thermal radiation data in order for the thermal radiation data to be displayed by an IR camera display as thermal images; and an IR camera display arranged to display thermal images to a user of the IR camera. The processing unit is further arranged to determine at least one temperature reference value representing the temperature of the surrounding environment of the imaged view; and calculate at least one output power value indicative of an amount of energy dissipated in a part of the imaged view by using the temperature value of the thermal radiation data corresponding to said part of the imaged view and the at least one determined temperature reference value.

An IR camera includes: a thermal radiation capturing arrangement for capturing thermal radiation of an imaged view in response to input control unit(s) receiving user inputs from a user of the IR camera; a processing unit arranged to process the thermal radiation data in order for the thermal radiation data to be displayed by an IR camera display as thermal images; and an IR camera display arranged to display thermal images to a user of the IR camera. The processing unit is further arranged to determine at least one temperature reference value representing the temperature of the surrounding environment of the imaged view; and calculate at least one output power value indicative of an amount of energy dissipated in a part of the imaged view by using the temperature value of the thermal radiation data corresponding to said part of the imaged view and the at least one determined temperature reference value.