7 results about "Narrow angle" patented technology

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.

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 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.