DEVICE FOR DETERMINING OPTICAL ABSORPTION LOSSES IN THIN FILMS Russian patent published in 2009 - IPC G01N21/55 

FIELD: physics; optics.

SUBSTANCE: invention relates to measurement techniques. The device includes a laser resonator with an active element, laser pumping and control apparatus, apparatus for measuring energy or power of the laser radiation and a plane-parallel plate which is placed in the resonator with possibility of displacement perpendicular its axis relative radiation which is incident on its inclined face with an angle θ₀ to the base. On the rear surface of the plane-parallel plate the test thin film is deposited in form of a wedge with vertex angle β, with minimum d and maximum 3d thickness.

EFFECT: simple design and increased accuracy of determining absorption losses in thin films.

3 dwg