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Type Ia windows, plates, cylinders and lasertargets
(normal, Raman low / ultra low fluorescence)

We manufacture diamond windows,plates, cylinders and lasertargets for different applications in high pressure.

We also provide service to the CVD diamond growth scientists. At Almax easyLab we prepare HPHT & CVD diamond substrates for CVD diamond growth experiments as well as lasercut and polish as grown freestanding CVD diamonds for prototype work.

Dimensions

Type Ia – (100)-oriented
X
in mm
Window or plate
X ranges from 0.50 up to 4.50 mm
H ranges from 0.02 up to 3.00 mm
Cylinder or diamond capsule cell
X = 1.50 mm
H = 1.00 up to 1.50 mm
W= 0.50 up to 1.00 mm
Lasertarget (example) X=1.50 mm
T=1.10 mm
C=0.90 mm
Htc=0.35+0.00+0.21 mm
FT-IR Spectrum

Fluorescence and birefringence

FLUORESCENCE

Almax easyLab can select its diamonds for low fluorescence. Standard measurements include laser excitation at 532 nm and covers fluorescence background in the range of 542 to 608 nm (Raman shifts between 1000 and 3000 cm-1). Measurements for different wavelength ranges can be made available on request. In special cases customers can select their own diamonds for low fluorescence using their own measurement set-up. Almax easyLab classifies its diamonds with respect to fluorescence according to the following criteria:

1. UV low fluorescence
Just checked by a UV lamp.

 
2. Raman low fluorescence
The intensity of the two-phonon Raman transition at 2664 cm-1 is at least 1.25 times the intensity of the background fluorescence of diamond.

 
3. Raman ultra low fluorescence
The intensity of the two-phonon Raman transition at 2664 cm-1 is at least 2 times the intensity of the background fluorescence of diamond.

BIREFRINGENCE
 
All diamonds to be used for anvil manufacture are examined under a polarising microscope for birefringence. Diamonds with significant birefringence discontinuity, typical of inclusions, etc. are rejected. In addition diamonds can be selected for ultralow birefringence. Total birefringence is measured using crossed polarisers, a waveplate and matched to specifications. Normally:
 
1. Low birefringence <0.0001
2. Ultra low birefringence <0.00005
Examples of typical requests for quote:
 
Diamond window, type Ia, 3.00 mm, thickness of 0.20 mm:
Quantity: 2 windows.
 
Diamond cylinder, outer diameter 1.50 mm, inner diameter 0.50 mm, height 1.00 mm:
Quantity: 10 cylinders.
 
Diamond lasertarget, type Ia, Boehler-Almax design, diameter 1.50 mm, total height 0.56 mm, culet 0.90 mm, bottom angle 35°, Htc=0.35+0+0.21, (100)-oriented:
Quantity: 20 Lasertargets.