Del Mar Ventures
4119 Twilight Ridge
San Diego, CA 92130
tel (858) 755-6727
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v/efax: (509) 752-0123
delmar@sciner.com
http://www.sciner.com/
http://www.femtosecondsystems.com/
Optics - Quartz Products - Retardation Plates (Waveplates)
Crystal Quartz
Crystal quartz is a very useful material because of its high UV, VIS and
NIR transmittance, birefringence, ability to rotate plane polarized light, high damage
threshold and resistance to scratching. The optical grade material is featured by highest
possible transmittance throughout range 190 - 2900 nm, virtual freedom from bubbles and
inclusions, conformity with Military striae Grade A. Grown boules are Z - crystals about
50 mm in the direction down optic axis.
Material properties
| Chemical Formula Positive uniaxial crystal Density, g/cm3 Mohs Hardness Heat Capacity at 300K, Jkg-1K-1 Thermal Expansion Coefficient at 300 K, 10-6 K-1 Thermal conductivity at 300 K, Wm-1K-1 |
SiO2 ne > no 2.65 7 733 a|| = 7.64 a^= 14.00 l|| = 9.5 l^= 6.10 |
Refractive indices at T = 291 K
| Wavelength 193,6 250,3 303,4 340,4 410,2 467,8 508,6 546,1 627,8 706,5 766,5 844,7 1000,0 1300,0 1529,6 1600,0 1800,0 2058,2 |
no 1,65999 1,60032 1,576955 1,56747 1,556502 1,551027 1,548229 1,546174 1,542819 1,540488 1,539071 1,537525 1,53503 1,53102 1,52800 1,52703 1,52413 1,51998 |
ne 1,67343 1,61139 1,58720 1,577385 1,566031 1,560368 1,557475 1,555350 1,551880 1,549472 1,548005 1,54640 1,54381 1,53962 1,53646 1,53545 1,53242 1,52814 |
High quality synthetic optical quartz
Grade |
Optical
absorption a, cm-1 |
Striae grade as per MIL-G174B |
|
|---|---|---|---|
190 nm |
2800 nm |
||
OQ 1 |
0.010 |
0.030 |
A |
OQ 2 |
0.025 |
0.045 |
A |
OQ 3 |
0.050 |
0.070 |
A |
Wide sizes range, mm
|
min | max |
|---|---|---|
| along <100> axis | 5 | 100 |
| along <010> axis | 5 | 100 |
Size tolerance, mm
0.05 - 0.1 or less
X-ray orientations of crystals according to any customer’s
specifications with accuracy up to 2 arcmin
High quality polishing per MIL-013830A
| surface irregularity | up to l/10 at 0.63 mm |
| surface quality (Scratch/ Dig) | up to 10 / 5 |
| wedge | up to 5 arc. sec. |
AR coating per MIL-C-014806A
| for single wavelength | less than 0.05 % |
| for broadband | 0.2 - 0.4 % |
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