Patent ID: 7325354

Claim:
A weapon mountable sight, comprising: a housing configured to be coupleable to a weapon; a laser diode configured to generate a dot, the laser diode having a principal wavelength; and an optical element having a parabolically shaped first surface having a relatively low reflectance coating at an 11 degree angle of incidence around the principal wavelength, the optical element mounted in the housing to allow a user to look therethrough to provide a simultaneous view of the dot and a target scene, wherein the first surface of the optical element generally conforms to a parabola having a formula: z = cr 2 1 + 1 - ( 1 + k ) ⁢ c 2 ⁢ r 2 (where: r=radial position on lens surface c=surface curvature (=1/radius) k=conic constant.