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.

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.

A tritium housing includes a body extending from a first end to a second end to define a hollow extending therebetween. A lens is disposed adjacent and surrounded by the first end of the body and a sleeve is disposed within said hollow and extends from a closed end disposed adjacent the second end of the housing to an open end disposed adjacent the lens. A tritium vial is disposed within the sleeve to produce illumination visible through the lens. The body is comprised of a colored plastic material for magnifying and brightening the tritium illumination during a daylight use of the tritium housing.

A tritium housing includes a body extending from a first end to a second end to define a hollow extending therebetween. A lens is disposed adjacent and surrounded by the first end of the body and a sleeve is disposed within said hollow and extends from a closed end disposed adjacent the second end of the housing to an open end disposed adjacent the lens. A tritium vial is disposed within the sleeve to produce illumination visible through the lens. The body is comprised of a colored plastic material for magnifying and brightening the tritium illumination during a daylight use of the tritium housing.

An improvement to an optical assembly that is adapted to accept light from a field of view in front of the optical assembly and create a first inverted image on a first image plane. Further the assembly includes an objective lens, a first prism adapted to receive light from the objective lens and a second prism, adapted to receive light from the first prism and emit light. The improvement is the addition of a negative lens interposed between the first prism and the second prism, thereby reducing the total optical pathway of the optical assembly, relative to a device performing the same optical function and lacking the negative lens.

An improvement to an optical assembly that is adapted to accept light from a field of view in front of the optical assembly and create a first inverted image on a first image plane. Further the assembly includes an objective lens, a first prism adapted to receive light from the objective lens and a second prism, adapted to receive light from the first prism and emit light. The improvement is the addition of a negative lens interposed between the first prism and the second prism, thereby reducing the total optical pathway of the optical assembly, relative to a device performing the same optical function and lacking the negative lens.

A sight includes a cylinder, a first lens, a first lens seat, and at least one first elastic member. The first lens is disposed in the cylinder. The first lens seat carrying the first lens is disposed in the cylinder. The first elastic member is disposed between an outer surface of the first lens seat and an inner periphery of the cylinder, wherein the first lens seat is tightly fitted with the cylinder and light enters the cylinder through the first lens.

A sight includes a cylinder, a first lens, a first lens seat, and at least one first elastic member. The first lens is disposed in the cylinder. The first lens seat carrying the first lens is disposed in the cylinder. The first elastic member is disposed between an outer surface of the first lens seat and an inner periphery of the cylinder, wherein the first lens seat is tightly fitted with the cylinder and light enters the cylinder through the first lens.