Acoustic damping material for electro-optic materials
An acoustic damping material for electro-optic material has an adhesive material combined with a ceramic crystalline material such that the acoustic impedance of the combined adhesive material and the ceramic crystalline material is substantially the same as the acoustic impedance of the electro-optic material.
1. An acoustic damping material for electro-optic material having an acoustic impedance comprising:
an adhesive material having an acoustic impedance substantially less than the acoustic impedance of the electro-optic material; and
a yttrium-aluminum-garnet ceramic crystalline material combined with the adhesive material such that the acoustic impedance of the combined adhesive material and the yttrium-aluminum-garnet ceramic crystalline material is substantially the same as the acoustic impedance of the electro-optic material.
2. The acoustic damping material as recited in claim 1 wherein the adhesive material comprises an epoxy.
3. The acoustic damping material as recited in claim 1 wherein the adhesive material comprises an ultra-violet cured epoxy.
4. The acoustic damping material as recited in claim 1 wherein the adhesive material comprises a urethane.
5. The acoustic damping material as recited in claim 1 wherein the adhesive material comprises a silicone.
6. The acoustic damping material as recited in claim 1 wherein the adhesive material is an epoxy and the yttrium-aluminum-garnet has a volume in the range of 25% to 50%.
7. The acoustic damping material as recited in claim 6 wherein the yttrium-aluminum-garnet has a volume of 50%.
8. The acoustic damping material as recited in claim 1 further comprising an optical absorbing material for absorbing optical radiation.
9. The acoustic damping material as recited in claim 8 wherein the optical absorbing material comprises carbon black.