Volumetric LED alignment aid for sighting device

A sighting device to assist a shooter in aiming at a target, the sighting device comprising:

• a frame housing coupled to a disk optical element, wherein the disk optical element comprises:
• a concave surface comprising an inner surface, an outer surface, and an outer edge, the outer edge of the concave surface comprising a curvature that is less than that of a curvature of the concave surface;
• a first coating disposed on the inner concave surface, wherein the first coating comprises a first dielectric film;
• a second coating disposed on the outer edge of the concave surface, wherein the second coating comprises a second dielectric film;
• and
• a light source coupled to a mount located at a focal point of the disk optical element wherein:
• emission of light from the light source faces the disk optical element;
• the light source comprises a dual wavelength LED;
• and
• the dual wavelengths of the LED match a first and second narrow band of light wavelengths from the first and second dielectric films, respectively.

A sighting device to assist a shooter in aiming at a target, the sighting device comprising:

• a frame housing coupled to a disk optical element, wherein the disk optical element comprises:
• a concave surface comprising an inner surface, an outer surface, and an outer edge, the outer edge of the concave surface comprising a curvature that is less than that of a curvature of the concave surface;
• a first coating disposed on the inner concave surface;
• a second coating disposed on the outer edge of the concave surface;
• and
• a light source coupled to a mount located at a focal point of the disk optical element, wherein:
• emission of light from the light source faces the disk optical element;
• the light source comprises two single wavelength LEDs;
• the first coating comprises a first dielectric film;
• the second coating comprises a second dielectric film;
• the wavelengths of a first LED matches a first narrow band of light wavelengths from the first dielectric film;
• and
• the wavelengths of a second LED matches a second narrow band of light wavelengths from the second dielectric film.