Patent ID: 7821715
Filing Date: 2010-10-26
Classification: G02B

Abstract:
1. A diffractive optical element, comprising: a first optical element component on which a relief pattern for generating a desired diffraction effect is formed; a second optical element component bonded to a surface of said first optical element component on which said relief pattern is formed; a third optical element component bonded to a surface of said first optical element component opposite the surface on which said second optical element component is bonded to said first optical element component; and a fourth optical element component bonded to a surface of said second optical element component opposite the surface on which said second optical element component is bonded to said relief pattern of said first optical element component; wherein said first and second optical element components comprise a relatively high refractive index and low dispersion material, and a relatively low refractive index and high dispersion material, respectively; and said third and fourth optical element components are refractive lenses having curved surface shape of positive refractive power at surfaces that interface with the environment.