17 results about "Narrow angle" patented technology

An apparatus and method for calibration between wide angle-narrow angle lenses through a dual-ChArUco board is disclosed. A method of calibration between wide angle-narrow angle lenses through a dual-ChArUco board includes recognizing a first pattern through a wide-angle lens of a first sensor and recognizing a second pattern through a narrow-angle lens of a second sensor, storing the first pattern and the second pattern; and calibrating the stored first pattern and the stored second pattern.

The invention discloses an optical system of an infrared thermal imager, and the system comprises a super-structure lens module which employs a silicon-based super-structure lens, and achieves 3-5 [mu] m and 8-12 [mu] m multi-band focusing through a single sheet; the free-form surface lens is matched with the super-structure lens to correct asymmetric aberration; the multi-view-field switching mechanism is used for driving a zoom group through a micro stepping motor to realize switching between a wide angle and a narrow angle; the active athermalization compensation unit comprises an MEMS driver and a temperature sensor, and the lens spacing is dynamically adjusted through closed-loop control; and the intelligent processing module is integrated with an embedded FPGA processor and operates a deconvolution algorithm to suppress diffraction stray light at the edge of the super-structure lens. According to the optical system of the infrared thermal imager, the problems that a traditional infrared optical system is large in size, high in weight and poor in environmental adaptability are solved through the innovative optical design and manufacturing process, and efficient and long-time patrol flight detection of the unmanned aerial vehicle-mounted infrared thermal imager is achieved.

The invention relates to an information processing device and a program, and provides a technology capable of more accurately inspecting an object using sensing data. An inspection support device (200) according to one embodiment of the present invention: acquires narrow angle data (D22) and wide angle data (D21) in which the shapes of a relatively narrow range and a relatively wide range of an object to be inspected are respectively represented, and the relationship between the positions and postures of sensors (110, 120) at the time of each acquisition is predetermined in advance; a set (narrow-angle data group (DG12) and wide-angle data group (DG11)) of each of narrow-angle data (D12) and wide-angle data (D11), each of which represents a relatively narrow range and a shape of a relatively wide range of an object to be compared, and in which a relationship between positions and orientations of sensors (110, 120) at the time of acquisition of each of the narrow-angle data (D12) and wide-angle data (DG11) is predetermined in advance, is acquired. On the basis of the wide-angle data (D21) and the wide-angle data group (DG11), the narrow-angle data (D22) and narrow-angle data (D12) indicating the same part of the comparison object as the part of the inspection object corresponding to the narrow-angle data (D22) are associated with each other.

To enable effective UV light distribution control.SOLUTION: A reflector disclosed herein has a reflective surface (644) for reflecting UV rays, the reflective surface (644) comprising a first surface (644a) arranged at a narrow angle with an optical axis (61a) of the UV rays and a second surface (644b) arranged at a wide angle with the optical axis (61a), where the second surface (644b) has a specular reflectance lower than that of the first surface (644a).SELECTED DRAWING: Figure 11

An electronic device has a narrow viewing angle state and a wide viewing angle state, and includes a panel and a light source providing a light passing through the panel. In the narrow viewing angle state, the light has a first relative light intensity and a second relative light intensity. The first relative light intensity is the strongest light intensity, the second relative light intensity is 50% of the strongest light intensity, the first relative light intensity corresponds to an angle of 0°, the second relative light intensity corresponds to a half-value angle, and the half-value angle is between −15° and 15°. In the narrow angle state, a third relative light intensity at each angle between 20° and 60° or each angle between −20° and −60° is lower than 20% of the strongest light intensity.

1. The name of this design product: LED floodlight (narrow angle). 2. Purpose of this design product: for lighting. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

An image pickup apparatus capable of tracking a subject focusable even with a narrow angle of view is provided. The image pickup apparatus includes a first image pickup unit obtaining a wide-angle image, a second image pickup unit obtaining an image having an angle of view narrower than an angle of view of the first image pickup unit, a pan and tilt apparatus holding the first image pickup unit and the second image pickup unit so that they are capable of rotating in pan and tilt directions, and a control unit that determines as a tracking target, based on range finding results of subjects recognized from an image obtained by the first image pickup unit, a subject existing within a distance range focusable by the second image pickup unit among the recognized subjects, and controls the pan and tilt apparatus so as to track the subject being the tracking target.

Methods and systems relating generally to information displays, and more particularly to systems and methods for backlight assemblies for information displays that emit an angularly narrow cone of light. A backlight assembly that emits a narrow angular cone of light can be particularly beneficial in a head-mounted display configuration, such as for use as part of virtual reality or augmented reality systems, where the head-mounted display comprises a lens assembly that directs light from an information display to the eyes of the user. Such a backlight assembly configuration may help reduce undesirable visual effects like flood illumination, ghost images, glare, and scattering.

The invention relates to a preparation method of a small-angle flat-top holographic scattering film, and belongs to the field of optical devices. Aiming at the problems of non-uniform brightness and large scattering angle diffusion range caused by Gaussian light intensity distribution of the traditional holographic scattering film, the invention provides a solution scheme for cooperatively regulating and controlling multi-angle superposition exposure and refractive index difference between photosensitive adhesive layers. The method specifically comprises the following steps: pre-treating a substrate, spin-coating thick positive photoresist, performing stepped soft baking, performing multi-angle oblique incidence exposure, developing to form a photoresist master mask, and performing transfer printing through double-layer photosensitive glue and regulating and controlling a refractive index difference. According to the method, flat-top scattering light intensity distribution is realized, the full width at half maximum is 15-25 degrees, and the brightness uniformity and the energy efficiency are remarkably improved; meanwhile, by adjusting the incident angle, the light spot shape and the refractive index difference, the requirements of different application scenes can be flexibly met. The method is high in process compatibility, is suitable for head-up display and other optical systems with narrow angle and high uniformity requirements, and has high stability and large-scale production potential.

This application provides a method, apparatus, electronic device, and storage medium for determining the morphology of the anterior chamber angle. The method first acquires UBM images of the left and right eyes and segments the cornea, iris, and lens. Then, it calculates the closest and furthest distances between the first iris and the corneal reference center point in the target direction, and determines whether an anterior chamber angle is closed or open based on the ratio of the two distances and a first threshold. This method transforms the angle problem into a distance problem for measurement, thus making the determination result more accurate, simple, and efficient. When the first anterior chamber angle is open, the first anterior chamber angle is corrected based on the second initial angle of the mirrored second anterior chamber angle and the mirror similarity between the left and right eye UBM images to obtain the target angle. Then, it determines whether it is a narrow angle or an open angle based on the target angle and the second threshold. Since the target angle integrates mirror and similarity factors, the error is effectively reduced, and the determination accuracy is significantly improved.

This utility model discloses an ultra-wide-angle symmetrical projection device, comprising a light source and a reflector with a "U"-shaped structure. The light source is installed in the center of the inner side of the reflector, and the light is guided by multiple sets of reflective surfaces to form four independent illumination areas. This device can simultaneously produce ultra-wide-angle illumination on both sides and long-distance light distribution effect in a narrow angle in front, achieving symmetrical lighting characteristics of ultra-wide-angle on the long side and focused light on the short side. It is suitable for applications requiring large-area and high-precision guided lighting.

The present invention provides a device 1 that can reduce the risk of angle-to-angle narrowing after ICL (intraocular lens) implantation surgery. [Solution] The device 1 includes a calculation unit 5. The calculation unit 5 (acquisition unit) acquires at least the preoperative AOD (preoperative angle of view) from the patient before ICL insertion. The calculation unit 5 (calculation unit) calculates the vault threshold using the acquired preoperative AOD, based on a threshold calculation formula that calculates a pre-set vault threshold, which is an indicator of narrow angle, with preoperative AOD and vault (distance) as variables. Furthermore, the calculation unit 5 (selection unit) selects the ICL lens size by referring to the calculated vault threshold.

The present invention relates to a field of optical lens, and discloses a camera lens with six-piece lenses including a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens, a fourth lens having a positive refractive power, a fifth lens, and a sixth lens having a negative refractive power. The camera lens satisfies following conditions: in an imaging status TTL / LB≤2.40, 0.20≤R1 / R2≤0.35, 0.20≤R1 / R2≤0.35, 0.02≤d5 / f≤0.04, and −0.90≤f2 / f≤−0.70. The present invention has a small height in a retraction status, and a narrow angle as well as good optical properties in the imaging status.

From the images captured by the camera, a captured image in which the inside condition of the refrigerator is appropriately captured is selected. The imaging system (7) includes: a narrow-angle camera (302) that captures an image of a refrigerator (2) including a freezing chamber (24) having a drawer (24A) having an opening formed in an upper surface thereof, the narrow-angle camera (302) being disposed on a top surface (20A) of the refrigerator (2); a subject (PS2) that is disposed at the upper end of the drawer (24A) and that changes the imaging state of the narrow-angle camera (302) in accordance with the amount of pull-out of the drawer (24A); a state storage unit (364) that stores a second imaging state (CD2), which is an imaging state of the object (PS2) to be imaged by the narrow-angle camera (302) when the drawer (24A) is pulled out by a predetermined amount; and a generation unit (356) that selects a second captured image (P2), which is a captured image when the drawer (24A) is in a pulled-out state, from the captured image (PB2) captured by the narrow-angle camera (302) on the basis of the second imaging state (CD2).

The subject invention pertains to a novel angle-closure detection method for risk assessment of primary angle closure (PAC) or primary angle closure glaucoma (PACG) to inform treatment decisions. According to certain embodiments, a plurality of cross-sectional images of the anterior segment of an eye centered at the pupil with preferably even radial separations are obtained from optical coherence tomography imaging. After identifying the position of scleral spur from the cross-sectional image captured at each angle-location, the anterior chamber angles are analyzed. Each angle-location of the eye is classified as (i) closed angle, (ii) narrow angle, or (iii) open angle. The extents of narrow angles and closed angles among all angle-locations across the 360° radial space are computed. Based on the extents of narrow angles and closed angles, a regression model is applied to compute the risk of PAC / PACG development.

Provided is a film-attached translucent substrate exhibiting the properties of translucency, light diffusivity, and opacity. The film-attached translucent substrate comprises a translucent substrate and a film on the translucent substrate. The surface of the film has a surface roughness represented by an RSm of 12 μm or greater and an Rk of 1.2 μm or greater, the total light transmittance Tt is 70% or greater, and the clarity C is 40% or less. The clarity C is a percentage calculated by using the equation [(Tp - Tn) / (Tp + Tn) × 100%] in which narrow angle diffuse light transmittance measured within a range of emission angles of ±2.5° is defined as Tn, and parallel light transmittance is defined as Tp.

A display device (40) and a method for adjusting the display device (40). The display device (40) includes at least one display unit (240), which includes a first control circuit (41), a first light-emitting pixel (43), a polarization layer (44), a second control circuit (42), and a nano-antenna structure (45). The second control circuit (42) can be connected to the polarization layer (44). By applying a certain voltage to the polarization layer (44), the polarization direction of the second light beam emitted from the polarization layer (44) is changed, thereby changing the scattering angle of the third light beam emitted from the nano-antenna structure (45). When the second control circuit (42) is connected to the nano-antenna structure (45), the material properties of the nano-antenna structure (45) are utilized to change the scattering angle of the third light beam by applying a certain voltage to the nano-antenna structure (45). Both connection structures change the scattering angle of the third light beam, allowing it to switch between a wide angle and a narrow angle range, thereby achieving an anti-peeping effect.