An optical fingerprint sensor (OFPS) for use with a liquid-crystal display (LCD) panel having a backlight module is positioned under the backlight module and captures an image of a fingerprint sensing area on the LCD panel through an aperture in both a reflector and a metal shield of the backlight module. The OFPS includes a sensor layer, a wafer-level optic layer bonded to the sensor layer and an infrared pass filter (IRPF) coating formed on a substantially flat top surface of the wafer-level optic layer. An OFPS may be formed with a flat top and may include a wafer-level optic layer having one or more lenses to direct light generated by a light source beneath the wafer-level optic layer. The wafer-level lenses may be bonded with the fingerprint scanner. The flat top of the OFPS may be made with an IRPF coating.

An optical fingerprint sensor (OFPS) for use with a liquid-crystal display (LCD) panel having a backlight module is positioned under the backlight module and captures an image of a fingerprint sensing area on the LCD panel through an aperture in both a reflector and a metal shield of the backlight module. The OFPS includes a sensor layer, a wafer-level optic layer bonded to the sensor layer and an infrared pass filter (IRPF) coating formed on a substantially flat top surface of the wafer-level optic layer. An OFPS may be formed with a flat top and may include a wafer-level optic layer having one or more lenses to direct light generated by a light source beneath the wafer-level optic layer. The wafer-level lenses may be bonded with the fingerprint scanner. The flat top of the OFPS may be made with an IRPF coating.

A beam splitter plate configured to dispose obliquely in a transmission path of an imaging beam of a camera and comprising a transmissive plate, and a beam splitter film supported on the transmissive plate and parallel to the transmissive plate, wherein the beam splitter film is configured to reflect visible light and transmit near-infrared light, or the beam splitter film is configured to reflect the near-infrared light and transmit the visible light, wherein a thickness of the transmissive plate satisfies that transmission path lengths of the visible light and the near-infrared light in the imaging beam in the transmissive plate are both less than a projection length of the beam splitter film on an optical axis of the imaging beam.

A beam splitter plate configured to dispose obliquely in a transmission path of an imaging beam of a camera and comprising a transmissive plate, and a beam splitter film supported on the transmissive plate and parallel to the transmissive plate, wherein the beam splitter film is configured to reflect visible light and transmit near-infrared light, or the beam splitter film is configured to reflect the near-infrared light and transmit the visible light, wherein a thickness of the transmissive plate satisfies that transmission path lengths of the visible light and the near-infrared light in the imaging beam in the transmissive plate are both less than a projection length of the beam splitter film on an optical axis of the imaging beam.

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 fixed-focus lens includes an anti-radiation first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in order in a direction. An aperture stop is disposed between the first lens and the fourth lens. A ratio of a lens diameter of the first lens to an overall length is within a range of 0.4 to 0.5, where the overall length is an axial distance between an outer surface of the first lens and an outer surface of the seventh lens. Each of the first lens to the seventh lens is a spherical glass lens.

An imaging lens including an aperture stop, a first lens, a second lens and a third lens sequentially arranged along an optical axis from an object side to an image side is provided. The first lens is an aspheric glass lens and has positive refracting power. The second lens is an aspheric plastic lens. The third lens is an aspheric plastic lens. The imaging lens has the transmittance higher than 85% for light with a wavelength of 940 nm and has the field of view less than 90 degrees.

A short-wavelength infrared imaging lens includes first and second lens groups arranged in order from an object side. The first lens group has a negative refractive power as a whole. The second lens group has a positive refractive power as a whole and includes at least one positive lens that satisfies following conditional expressions (1) and (2):
V2p>40  (1)
N2p>1.7  (2) Here, N2p is a refractive index N [1.53] of the positive lens at a wavelength of 1.53 μm, and the Abbe number V2p is an Abbe number of the positive lens in a short-wavelength infrared range and is defined as (N [1.53]−1)/(N [0.9]−N [2.325]) when refractive indexes of the at least one positive lens at wavelengths of 0.9 μm, 1.53 μm, and 2.325 μm are represented by N [0.9], N [1.53], and N [2.325], respectively.

A short-wavelength infrared imaging lens includes first and second lens groups arranged in order from an object side. The first lens group has a negative refractive power as a whole. The second lens group has a positive refractive power as a whole and includes at least one positive lens that satisfies following conditional expressions (1) and (2):
V2p>40  (1)
N2p>1.7  (2) Here, N2p is a refractive index N [1.53] of the positive lens at a wavelength of 1.53 μm, and the Abbe number V2p is an Abbe number of the positive lens in a short-wavelength infrared range and is defined as (N [1.53]−1)/(N [0.9]−N [2.325]) when refractive indexes of the at least one positive lens at wavelengths of 0.9 μm, 1.53 μm, and 2.325 μm are represented by N [0.9], N [1.53], and N [2.325], respectively.

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.