Abstract: Two types of blue light blocking contact lenses are provided and are formed by curing different compositions. The first composition includes a blue light blocking component formed by mixing or reacting a first hydrophilic monomer and a yellow dye, a first colored dye component formed by mixing or reacting a second hydrophilic monomer and a first colored dye, at least one third hydrophilic monomer, a crosslinker, and an initiator. The first colored dye includes a green dye, a cyan dye, a blue dye, an orange dye, a red dye, a black dye, or combinations thereof. The second composition includes a blue light blocking component, at least one hydrophilic monomer, a crosslinker, and an initiator. The blue light blocking component is formed by mixing or reacting glycerol monomethacrylate and a yellow dye. Further, methods for preparing the above contact lenses are provided.

Abstract: A night-vision optical device is provided, including a main body, a lens module, and a display module. The lens module includes an aperture element, a lens element, an electromagnetic driving assembly, an image sensor, and a digital signal processor. In response to an ambient light level around the night-vision optical device satisfying a predetermined condition, the digital signal processor (DSP) controls the night-vision optical device to enter a first mode, and controls the electromagnetic driving assembly to drive a first portion of a filter member to a first position to align an optical axis of the lens element. In response to the ambient light level not satisfying a predetermined condition, the DSP controls the night-vision optical device to enter a second mode, and controls the electromagnetic driving assembly to drive the second portion of the filter member to the first position.

Abstract: An electronic sighting apparatus is programmed or configured to stretch or adjust a reticle as part of a set up or calibration process using a dedicated input button on an electronic scope.

Abstract: A night-vision optical device is provided, including a main body, a lens module, and a display module. The lens module includes an aperture element, a lens element, an electromagnetic driving assembly, an image sensor, and a digital signal processor. In response to an ambient light level around the night-vision optical device satisfying a predetermined condition, the digital signal processor (DSP) controls the night-vision optical device to enter a first mode, and controls the electromagnetic driving assembly to drive a first portion of a filter member to a first position to align an optical axis of the lens element. In response to the ambient light level not satisfying a predetermined condition, the DSP controls the night-vision optical device to enter a second mode, and controls the electromagnetic driving assembly to drive the second portion of the filter member to the first position.

Abstract: A sighting device is provided, configured to aim at a target, including a sight module, a rangefinder module, and a securing mechanism configured to detachably secure the rangefinder module to the sight module. The rangefinder module is configured to determine the distance between the rangefinder module and the target. The rangefinder module is disposed on a side of the sight module and has a digital numeric display, and the distance between the rangefinder module and the target is displayed on the digital numeric display.

Abstract: A sighting device is provided, configured to aim at a target, including a main body, a lens module, a display module, an infrared light assembly, and a filter member. The main body includes a first side and a second side. The lens module is disposed on the first side and has a lens element and an image sensor. The display module is disposed on the second side, connected to the lens module and configured to display an image. The infrared light assembly is disposed on the first side and can be switched between an open state and a closed state. The filter member is disposed between the lens element and the image sensor, and an infrared cutting region thereof is overlapping them or not according to the infrared light assembly in the closed state or the open state.

Abstract: An optical binocular is provided, including a main body, a lens module, a display module, a first light source assembly and a second light source assembly. The lens module is disposed on one side of the main body. The display module is disposed in the main body and electrically connected to the lens module, and is configured to display an image. The first light source assembly includes a first light source and a first lens, and emits a first light. The second light source assembly includes a second light source and a second lens, and emits a second light. The first light source emits a long-range light through the first lens, and the second light source emits a close-range light through the second lens, wherein the focal length of the first lens is greater than the focal length of the second lens.

Abstract: An optical binocular is provided, including a main body, a lens module, a display module, a first light source assembly and a second light source assembly. The lens module is disposed on one side of the main body. The display module is disposed in the main body and electrically connected to the lens module, and is configured to display an image. The first light source assembly includes a first light source and a first lens, and emits a first light. The second light source assembly includes a second light source and a second lens, and emits a second light. The first light source emits a long-range light through the first lens, and the second light source emits a close-range light through the second lens, wherein the focal length of the first lens is greater than the focal length of the second lens.

Abstract: A cell phone heating device for heating a cell phone is provided, including: a main body; a heating element disposed in the main body for heating the cell phone; a temperature-control element disposed in the main body for detecting the temperature of the main body and providing a signal to control the heating element according to the temperature; and a power source disposed in the main body for providing current to the heating element and the temperature-control element.

Abstract: A sighting device is provided, configured to aim at a target, including a main body, a lens module, a display module, an infrared light assembly, and a filter member. The main body includes a first side and a second side. The lens module is disposed on the first side and has a lens element and an image sensor. The display module is disposed on the second side, connected to the lens module and configured to display an image. The infrared light assembly is disposed on the first side and can be switched between an open state and a closed state. The filter member is disposed between the lens element and the image sensor, and an infrared cutting region thereof is overlapping them or not according to the infrared light assembly in the closed state or the open state.

Abstract: An electronic telescope is provided, including a main body, a lens module, a display module, and a single eyepiece. The main body includes an objective end and an eyepiece end which is opposite to the objective end. The lens module is disposed on the objective end. The display module connects to the lens module and is configured to display an image captured from the lens module. The single eyepiece lens with a single focus has a longitudinal structure and is disposed on the eyepiece end, wherein the eyepiece lens corresponds to the user's two eyes.

Abstract: An electronic telescope is provided, including a main body, a lens module, a display module, and a single eyepiece. The main body includes an objective end and an eyepiece end which is opposite to the objective end. The lens module is disposed on the objective end. The display module connects to the lens module and is configured to display an image captured from the lens module. The single eyepiece lens with a single focus has a longitudinal structure and is disposed on the eyepiece end, wherein the eyepiece lens corresponds to the user's two eyes.

Abstract: A lure camera is provided, including a case, a micro camera, a circuit board unit, and a waterproof button. The micro camera is disposed in the case for taking images of things that are outside of the case. The circuit board unit is disposed in the case and includes a circuit board electrically connected to the micro camera and a button switch installed on the circuit board. The waterproof button is disposed on the case and corresponds to the button switch, and includes a button body, an elastic waterproof film, and a securing member. The micro camera is controllable to start and stop recording by operating the waterproof button. The waterproof button prevents water from entering the lure camera.

Abstract: A single-use digital camera is disclosed. The one-time-use digital camera includes a camera body and a battery cartridge. When the battery cartridge is connected to the camera body, the camera body is activated by the battery cartridge. When the battery cartridge is separated from the camera body or when a predetermined amount of pictures stored in the camera body are downloaded, the camera body is deactivated and the battery cartridge is locked.