Abstract: An optical lens assembly includes, in order from a visual side to an image source side: an optical group including a partial-reflective-partial-transmissive element; and in order from the visual side to the image source side: an absorptive polarizer, a reflective polarizer, a phase retarder, a first lens, a second lens, and a third lens; wherein the partial-reflective-partial-transmissive element is disposed between the first lens and the third lens; at least one of the first lens and the second lens has a positive refractive power; when the focus of the optical lens assembly changes from a near point to a far point, the optical group moves from the image source side to the visual side. The optical lens assembly may become lightweight and have good image quality when satisfying a specific condition.

Abstract: An optical lens assembly includes a phase retarder; a partial-reflective-partial-transmissive element; and in order from a visual side to an image source side: an absorptive polarizer, a reflective polarizer, a first lens with refractive power, a second lens with refractive power, and a third lens with positive refractive power; wherein the phase retarder and the partial-reflective-partial-transmissive element are sequentially arranged from the visual side to the image source side, and are disposed between the reflective polarizer and the third lens. The optical lens assembly may become lightweight and have good image quality when satisfying a specific condition.

Abstract: An optical lens assembly includes a first lens; an optical element group including, in order from a visual side to an image source side: an absorptive polarizer, a reflective polarizer and a phase retarder; a second lens; a third lens; and a partial-reflective-partial-transmissive element. The first lens, the second lens, the third lens and the partial-reflective-partial-transmissive element are sequentially arranged from the visual side to the image source side. The optical element group is disposed between the first lens and the third lens. The phase retarder is disposed between the reflective polarizer and the third lens. The optical lens assembly may become lightweight and have good image quality when satisfying a specific condition.

Abstract: An optical lens assembly includes, an optical element group; and in order from a visual side to an image source side: a first lens with positive refractive power, a second lens with refractive power, a third lens with refractive power, and an image source-side surface of the third lens being convex in a paraxial region thereof, and a partial-reflective-partial-transmissive element. Wherein the optical element group is disposed between the first lens and the third lens, and includes, in order from the visual side to the image source side: an absorptive polarizer, a reflective polarizer and a phase retarder. The optical lens assembly may become lightweight and have good image quality when satisfying a specific condition.

Abstract: An optical lens assembly includes, in order from a visual side to an image source side: an optical element including, in order from the visual side to the image source side: an absorptive polarizer, a reflective polarizer and a phase retarder; a first lens with refractive power, and an image source-side surface of the first lens being convex in a paraxial region thereof; and a second lens with refractive power, and a visual-side surface of the second lens being concave in a paraxial region thereof and provided with a partial-reflective-partial-transmissive element. The optical element is disposed on a visual-side surface of the first lens. The optical lens assembly may become lightweight and have good image quality when satisfying a specific condition.

Abstract: An optical lens assembly includes: a first element group including: a first lens group with positive refractive power, including one or two lenses; a second element group including: a second lens group with positive refractive power, including two or three lenses; an optical element including, in order from a visual side to an image source side: an absorptive polarizer, a reflective polarizer and a first phase retarder; and a partial-reflective-partial-transmissive element; and a third element group including an image source plane. The first element group, the second element group and the third element group are arranged in order from the visual side to the image source side. When the optical lens assembly satisfies a specific condition, the weight of the device can be reduced, the zoom function can be provided, and the image quality can be ensured.

Abstract: An optical lens assembly includes: a first element group, including a first lens group, a partial-reflective-partial-transmissive element and a first optical layer that is located on a visual-side surface of a lens of the first lens group closest to a visual side and includes, in order from the visual side to an image source side, a first absorptive polarizer, a reflective polarizer and a first phase retarder; a second element group, including a second lens group and an image source plane; and a second optical layer, located between the partial-reflective-partial-transmissive element and the image source plane and including, in order from the visual side to the image source side, a second phase retarder and a second absorptive polarizer. When the optical lens assembly satisfies a specific condition, the weight of the device can be reduced, the zoom function can be provided, and the image quality can be ensured.

Abstract: An optical lens assembly includes, in order from a visual side to an image source side: a first lens with positive refractive power; an optical element including, in order from the visual side to the image source side, an absorptive polarizer, a reflective polarizer and a first phase retarder; a second lens with positive refractive power; a partial-reflective-partial-transmissive element; a second phase retarder; and an image source plane. The optical lens assembly has a total of two lenses with refractive power. A focal length of the optical lens assembly is f, a maximum image-source height of the optical lens assembly is IMH, a focal length of the first lens is f1, a focal length of the second lens is f2, and following conditions are satisfied: 0.40<IMH/f<1.26 and 0.21<f2/f1<2.35. A head-mounted electronic device includes the optical lens assembly.

Abstract: An optical lens assembly includes, in order from a visual side to an image source side: a first group including a first lens group and an optical element, and the optical element including, in order from the visual side to the image source side: an absorptive polarizer, a reflective polarizer and a first phase retarder; a second group including, in order from the visual side to the image source side: a second lens group with positive refractive power and a partial-reflective-partial-transmissive element; and a third group including, in order from the visual side to the image source side: a second phase retarder and an image source plane. When the optical lens assembly satisfies certain conditions, the weight of the device can be reduced, the zooming function can be provided, and the image quality can be ensured.

Abstract: A fingerprint identification apparatus and an electronic device are provided, which can improve the fingerprint imaging quality while achieving the lightness and thinness of the fingerprint identification apparatus. The fingerprint identification apparatus is applicable to be under a display screen, including a plurality of fingerprint identification units arranged in an array, where each fingerprint identification unit includes: a micro-lens; at least one light shielding layer, where each light shielding layer is provided with a light passing hole, a bottom light shielding layer is provided with N light passing hole, and a largest aperture D1 of each light passing hole and a largest aperture CA of the micro-lens satisfy 0.02D1/CA0.4, to form N light guiding passages in different directions; N pixel units, disposed under the at least one light shielding layer, and disposed in one-to-one correspondence with bottoms of N light guiding passages.

Abstract: A fingerprint detection apparatus and an electronic device are provided. The fingerprint detection apparatus is applied under a display screen, the fingerprint detection apparatus includes a plurality of fingerprint detecting units distributed in an array or arranged in a staggered manner, and the fingerprint detecting unit includes: a plurality of optical sensing pixels; at least one micro lens disposed above the plurality of optical sensing pixels; and at least one light shielding layer disposed between the at least one micro lens and the plurality of optical sensing pixels, each of the at least one light shielding layer being provided with an opening corresponding to the plurality of optical sensing pixels; where oblique light signals in multiple directions are respectively transmitted to the plurality of optical sensing pixels through an opening provided in the at least one light shielding layer after being converged by the at least one micro lens.

Abstract: A depth detection apparatus includes: an emitting assembly for emitting a speckle light signal to a detection object, where the emitting assembly is configured to cause the speckle light signal to generate positive distortion; an imaging lens for imaging, to a photoelectric sensor, a depth light signal returned after the speckle light signal strikes the detection object, wherein the imaging lens is configured to cause the imaging of the depth light signal to generate negative distortion; and a photoelectric sensor for converting the depth light signal into an electrical signal, wherein a difference between an absolute value of a distortion amount of the negative distortion and an absolute value of a distortion amount of the positive distortion does not exceed 0.05, and the negative distortion and the positive distortion each are distortion having a distortion amount whose absolute value is greater than or equal to 0.03.

Abstract: 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.

Abstract: A fingerprint identification apparatus and an electronic device are provided, which can improve the fingerprint imaging quality while achieving the lightness and thinness of the fingerprint identification apparatus. The fingerprint identification apparatus is applicable to be under a display screen, including a plurality of fingerprint identification units arranged in an array, where each fingerprint identification unit includes: a micro-lens; at least one light shielding layer, where each light shielding layer is provided with a light passing hole, a bottom light shielding layer is provided with N light passing hole, and a largest aperture D1 of each light passing hole and a largest aperture CA of the micro-lens satisfy 0.02D1/CA0.4, to form N light guiding passages in different directions; N pixel units, disposed under the at least one light shielding layer, and disposed in one-to-one correspondence with bottoms of N light guiding passages.

Abstract: A three-piece infrared single wavelength projection lens system includes, in order from an image side to an image source side: a first lens element with a positive refractive power; a second lens element with a refractive power; a third lens element with a positive refractive power; a stop disposed before an image source-side surface of the first lens element or between the image source-side surface of the first lens element and an image source-side surface of the second lens element; and the first lens element or the second lens element is made of glass. Such arrangements can provide a three-piece infrared single wavelength projection lens system with better image sensing function.

Abstract: A three-piece infrared single wavelength projection lens system includes, in order from an image side to an image source side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a positive refractive power; and a stop disposed before an image source-side surface of the first lens element or between an image-side surface of the first lens element and an image source-side surface of the second lens element. Such arrangements can provide a three-piece infrared single wavelength projection lens system with better image sensing function.

Abstract: A fingerprint detection apparatus and an electronic device are provided. The fingerprint detection apparatus is applied below a display screen to implement under-screen optical fingerprint detection, and the fingerprint detection apparatus includes: a micro lens array disposed below the display screen; Z light shielding layers disposed below the micro lens array, each of the Z light shielding layers being provided with an array of small holes, where Z is a positive integer; and an optical sensing pixel array disposed below an array of small holes of a bottom light shielding layer of the Z light shielding layers; where an array of small holes of each of the Z light shielding layers satisfies 0?Xi/Zd?3. By restricting structure parameters of small holes in an array of small holes, aliasing of transmission of light signals returned via different positions of a finger could be avoided.

Abstract: A fingerprint detection apparatus and an electronic device are provided. The fingerprint detection apparatus is applied under a display screen, the fingerprint detection apparatus includes a plurality of fingerprint detecting units distributed in an array or arranged in a staggered manner, and the fingerprint detecting unit includes: a plurality of optical sensing pixels; at least one micro lens disposed above the plurality of optical sensing pixels; and at least one light shielding layer disposed between the at least one micro lens and the plurality of optical sensing pixels, each of the at least one light shielding layer being provided with an opening corresponding to the plurality of optical sensing pixels; where oblique light signals in multiple directions are respectively transmitted to the plurality of optical sensing pixels through an opening provided in the at least one light shielding layer after being converged by the at least one micro lens.

Abstract: A compact optical lens system includes, in order from the object side to the image side: a flat panel assembly made of glass, a first lens element with a negative refractive power, at least one of an object-side surface and an image-side surface of the first lens element being aspheric, a stop; and a second lens element with a positive refractive power having an object-side surface being convex near an optical axis and an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the second lens element being aspheric. Such a system can not only effectively collect light at a large angle, receive a wider range of images and achieve identification effects within very short distances, but also can reduce the distance between an object and the compact optical lens system, reduce the volume effectively and maintain its miniaturization.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a first lens element with a positive refractive power having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, a stop, a second lens element with a 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, high resolution, short length and less distortion.