An imaging system that includes an image sensor and imaging optics is provided. The image sensor has a sensing surface and it captures images of a scene. The imaging optics is optically coupled to the image sensor and is configured to form the images of the scene onto the sensing surface of the image sensor. The imaging optics includes a sensor-adjacent optical element having an exit surface located in close proximity to the sensing surface of the image sensor. The exit surface of the sensor-adjacent optical element and the sensing surface of the image sensor are spaced apart by a gap having a gap width enabling evanescent-wave coupling from the exit surface to the sensing surface for light having wavelengths within the sensor spectral range.

An imaging system that includes an image sensor and imaging optics is provided. The image sensor has a sensing surface and it captures images of a scene. The imaging optics is optically coupled to the image sensor and is configured to form the images of the scene onto the sensing surface of the image sensor. The imaging optics includes a sensor-adjacent optical element having an exit surface located in close proximity to the sensing surface of the image sensor. The exit surface of the sensor-adjacent optical element and the sensing surface of the image sensor are spaced apart by a gap having a gap width enabling evanescent-wave coupling from the exit surface to the sensing surface for light having wavelengths within the sensor spectral range.

A biometric authentication system includes a first image capturer that captures a visible light image that is imaged by picking up first light reflected from a skin portion of a subject that is irradiated with visible light; a second image capturer that captures a first infrared image that is imaged by picking up second light that is reflected from the skin portion irradiated with first infrared light and that has a wavelength region including a first wavelength; and a determiner that determines, in accordance with a result of comparing the visible light image with the first infrared image, whether the subject is a living body and outputs a determination result.

A biometric authentication system includes a first image capturer that captures a visible light image that is imaged by picking up first light reflected from a skin portion of a subject that is irradiated with visible light; a second image capturer that captures a first infrared image that is imaged by picking up second light that is reflected from the skin portion irradiated with first infrared light and that has a wavelength region including a first wavelength; and a determiner that determines, in accordance with a result of comparing the visible light image with the first infrared image, whether the subject is a living body and outputs a determination result.

A digital loupe system is provided which can include a number of features. In one embodiment, the digital loupe system can include a stereo camera pair and a distance sensor. The system can further include a processor configured to perform a transformation to image signals from the stereo camera pair based on a distance measurement from the distance sensor and from camera calibration information. In some examples, the system can use the depth information and the calibration information to correct for parallax between the cameras to provide a multi-channel image. Ergonomic head mounting systems are also provided. In some implementations, the head mounting systems can be configurable to support the weight of a digital loupe system, including placing one or two oculars in a line of sight with an eye of a user, while improving overall ergonomics, including peripheral vision, comfort, stability, and adjustability. Methods of use are also provided.

An optical imaging system for pickup, sequentially arranged from an object side to an image side, comprising: the first lens element with positive refractive power having a convex object-side surface, the second lens element with refractive power, the third lens element with refractive power, the fourth lens element with refractive power, the fifth element with refractive power; the sixth lens element made of plastic, the sixth lens with refractive power having a concave image-side surface with both being aspheric, and the image-side surface having at least one inflection point.

An optical imaging system for pickup, sequentially arranged from an object side to an image side, comprising: the first lens element with positive refractive power having a convex object-side surface, the second lens element with refractive power, the third lens element with refractive power, the fourth lens element with refractive power, the fifth element with refractive power; the sixth lens element made of plastic, the sixth lens with refractive power having a concave image-side surface with both being aspheric, and the image-side surface having at least one inflection point.

Disclosed are a depth data measuring device and a structured light projection unit included therein. The device comprises: a projection unit, configured to project structured light to the subject; an imaging unit, configured to photograph the subject to obtain a two-dimensional image frame illuminated by the structured light, wherein, the projection unit comprises: a laser generator configured to generate laser light; an LCOS (Liquid Crystal on Silicon) element configured to receive the laser light and generate the structured light for projection. The present disclosure uses LCOS for fine projection of structured light in order to improve imaging accuracy of depth data. LCOS can also transform various projection codes including speckles or stripes, so that it is suitable for various imaging scenarios. Furthermore, the VCSEL structure can be combined to achieve low power consumption and miniaturization of the projection unit, and multiple groups of coaxial photosensitive units can be introduced to reduce the imaging time required for multi-frame merging to calculate depth data and thereby increase the frame rate.

Disclosed are a depth data measuring device and a structured light projection unit included therein. The device comprises: a projection unit, configured to project structured light to the subject; an imaging unit, configured to photograph the subject to obtain a two-dimensional image frame illuminated by the structured light, wherein, the projection unit comprises: a laser generator configured to generate laser light; an LCOS (Liquid Crystal on Silicon) element configured to receive the laser light and generate the structured light for projection. The present disclosure uses LCOS for fine projection of structured light in order to improve imaging accuracy of depth data. LCOS can also transform various projection codes including speckles or stripes, so that it is suitable for various imaging scenarios. Furthermore, the VCSEL structure can be combined to achieve low power consumption and miniaturization of the projection unit, and multiple groups of coaxial photosensitive units can be introduced to reduce the imaging time required for multi-frame merging to calculate depth data and thereby increase the frame rate.

Various implementations disclosed herein include devices, systems, and methods that are capable of executing an application on a head-mounted device (HMD) having a first image sensor in a first image sensor configuration. In some implementations, the application is configured for execution on a device including a second image sensor in a second image sensor configuration different than the first image sensor configuration. In some implementations, a request is received from the executing application for image data from the second image sensor. Responsive to the request at the HMD, a pose of a virtual image sensor is determined, image data is generated based on the pose of the virtual image sensor, and the generated image data is provided to the executing application.