Del Mar Photonics - Newsletter Fall 2010 - Newsletter Winter 2010

Del Mar Photonics supply a variety of standard and custom Calcium Fluoride windows, lenses and prisms as well as other optical elements.
Most of the standard CaF2 lenses shown below are availbale in stock.

CaF2 Plano-Convex Lenses - request a quote

   Graph / Diagram
 
 
 

 

Specifications
 
Diameter Tolerance:
+0/-0.005
Thickness Tolerance:
0.010
Concentricity:
< 3 arc min.
Clear Aperture:
> 85% of diameter
Focal Length Tolerance
2%
Surface Figure:
l/2 at 632.8nm
Surface Quality:
40-20 scratch-dig

 

 

 

 

 

Part No.
Material
Diameter
R
Focal Length ( f )
ET
 
 
IC-PX-12.7-25
CaF2
0.5
10.4mm
 
25mm
 
2mm
IC-PX-12.7-50
CaF2
0.5
20.9mm
 
50mm
 
2mm
IC-PX-12.7-75
CaF2
0.5
31.3mm
 
75mm
 
2mm
IC-PX-12.7-100
CaF2
0.5
41.8mm
 
100mm
 
2mm
IC-PX-12.7-150
CaF2
0.5
62.6mm
 
150mm
 
2mm
IC-PX-12.7-200
CaF2
0.5
83.5mm
 
200mm
 
2mm
IC-PX-12.7-250
CaF2
0.5
104.4mm
 
250mm
 
2mm
IC-PX-12.7-300
CaF2
0.5
125.3mm
 
300mm
 
2mm
IC-PX-12.7-400
CaF2
0.5
167.0mm
 
400mm
 
2mm
IC-PX-12.7-500
CaF2
0.5
208.8mm
 
500mm
 
2mm
IC-PX-12.7-750
CaF2
0.5
313.2mm
 
750mm
 
2mm
IC-PX-12.7-1000
CaF2
0.5
417.5mm
 
1000mm
 
2mm
IC-PX-12.7-2000
CaF2
0.5
835.1mm
 
2000mm
 
2mm
 
 
 
 
 
 
 
 
IC-PX-25.4-50
CaF2
1.0
20.9mm
 
50mm
 
2mm
IC-PX-25.4-75
CaF2
1.0
31.3mm
 
75mm
 
2mm
IC-PX-25.4-100
CaF2
1.0
41.8mm
 
100mm
 
2mm
IC-PX-25.4-150
CaF2
1.0
62.6mm
 
150mm
 
2mm
IC-PX-25.4-200
CaF2
1.0
83.5mm
 
200mm
 
2mm
IC-PX-25.4-250
CaF2
1.0
104.4mm
 
250mm
 
2mm
IC-PX-25.4-300
CaF2
1.0
125.3mm
 
300mm
 
2mm
IC-PX-25.4-400
CaF2
1.0
167.0mm
 
400mm
 
2mm
IC-PX-25.4-500
CaF2
1.0
208.8mm
 
500mm
 
2mm
IC-PX-25.4-750
CaF2
1.0
313.2mm
 
750mm
 
2mm
IC-PX-25.4-1000
CaF2
1.0
417.5mm
 
1000mm
 
2mm
IC-PX-25.4-2000
CaF2
1.0
835.1mm
 
2000mm
 
2mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CaF2 Plano-Concave Lenses - request a quote

   Graph / Diagram
 
 
 

 

Specifications
 
Diameter Tolerance:
+0/-0.005
Thickness Tolerance:
0.010
Concentricity:
< 3 arc min.
Clear Aperture:
> 85% of diameter
Focal Length Tolerance
0.5%
Surface Figure:
l/2 at 632.8nm
Surface Quality:
40-20 scratch-dig

 

 

 

 

 

Part No.
Material
Diameter
R
        Focal Length ( f )
Thickness
CT
 
IC-PC-12.7-25
CaF2
0.5
10.4mm
 
25mm
2-3mm
IC-PC-12.7-50
CaF2
0.5
20.9mm
 
50mm
2-3mm
IC-PC-12.7-75
CaF2
0.5
31.3mm
 
75mm
2-3mm
IC-PC-12.7-100
CaF2
0.5
41.8mm
 
100mm
2-3mm
IC-PC-12.7-150
CaF2
0.5
62.6mm
 
150mm
2-3mm
IC-PC-12.7-200
CaF2
0.5
83.5mm
 
200mm
2-3mm
IC-PC-12.7-250
CaF2
0.5
104.4mm
 
250mm
2-3mm
IC-PC-12.7-300
CaF2
0.5
125.3mm
 
300mm
2-3mm
IC-PC-12.7-400
CaF2
0.5
167.0mm
 
400mm
2-3mm
IC-PC-12.7-500
CaF2
0.5
208.8mm
 
500mm
2-3mm
IC-PC-12.7-750
CaF2
0.5
313.2mm
 
750mm
2-3mm
IC-PC-12.7-1000
CaF2
0.5
417.5mm
 
1000mm
2-3mm
IC-PC-12.7-2000
CaF2
0.5
835.1mm
 
2000mm
2-3mm
 
 
 
 
 
 
2-3mm
IC-PC-25.4-50
CaF2
1.0
20.9mm
 
50mm
2-3mm
IC-PC-25.4-75
CaF2
1.0
31.3mm
 
75mm
2-3mm
IC-PC-25.4-100
CaF2
1.0
41.8mm
 
100mm
2-3mm
IC-PC-25.4-150
CaF2
1.0
62.6mm
 
150mm
2-3mm
IC-PC-25.4-200
CaF2
1.0
83.5mm
 
200mm
2-3mm
IC-PC-25.4-250
CaF2
1.0
104.4mm
 
250mm
2-3mm
IC-PC-25.4-300
CaF2
1.0
125.3mm
 
300mm
2-3mm
IC-PC-25.4-400
CaF2
1.0
167.0mm
 
400mm
2-3mm
IC-PC-25.4-500
CaF2
1.0
208.8mm
 
500mm
2-3mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Calcium Fluoride (CaF2) prisms

Del Mar Photonics supply a variety of standard and custom Calcium Fluoride windows, lenses and prisms as well as other optical elements.
Calcium Fluoride is used for optical windows, lenses and prisms in the transmission range 0. 15 m to 9 m. The refractive index varies from about 1. 7 to 1. 3 in this wavelength range. Calcium Fluoride is particularly popular for high power laser optics in the IR less than 6 micron because of its low absorbtion. Degradation due to moisture in the atmosphere is minimal, and polished surfaces may be expected to withstand several years exposure to normal atmospheric conditions. Due too its low refractive index, Calcium Fluoride can be used without an anti-reflection coating.
Calcium Fluoride is attacked by atmospheric moisture at 600C, where it begins to soften. The top use temperature is 800C, when moisture is not present. Irradiation of Calcium Fluoride causes some loss in UV transmission. The material is sensitive to thermal shock.
 

Example of standard Calcium Fluoride prism (always available in stock!):
Dispersion prism, IR grade CaF2, 15x15x15x10 mm - request a quote

Below is an example of custom Calcium Fluoride prism as well as references to our standard items. To request custom quote for precision optical component please e-mail us detailed specifications and drawings or check our online store for standard components available in stock.

Example of custom made Calcium Fluoride prism: Part number: CaF2_Prism_72_69.7_38.6_BBAR_3_5

CaF2 equilateral prism
Size (tolerance +0.0/-0.10 mm)
Base : 38.6 mm
Height: 69.7 mm
Thickness: 72.0 mm
Angles: 2 x 75.53 (0.50) and 1 x 28.94 (0.10)
2 surfaces polished to SQ 60-40s/d, other fine ground
SF: Lambda/4 @ 3 microns per 25 mm
Pyramidal error: 0.1 degree
Clear aperture: 70 mm
Bevels: all edges 45 deg x 0.25 mm F.W.
Polished surfaces: AR coated at 3.0 5.0 microns, R<1% for AOI= 0 - 35
 

Del Mar Photonics -  Del Mar Photonics featured customer Dennis Hore writes:

Our group works to characterize the interaction of biomolecules with solid surfaces.  Nature designs proteins with well-defined structures
in solution.  The conformation of these molecules may serve a structural purpose, or a chemical one in the case of enzymes.  In order to further the progress of technologies that immobilize such molecules on synthetic surfaces (like biosensors employing enzymes), it is important to have a detailed understanding and control of the interactions of these molecules with the surface.

We use a variety of optical techniques along with computer modeling to achieve such a detailed molecular-level understanding.  One of the
optical methods employed in our lab is a nonlinear technique: visible-infrared sum-frequency generation spectroscopy.  Here a fixed-wavelength visible (532 nm) and tunable-infrared (2-10 microns) laser are spatially- and temporally-overlapped at the solid-solution interface under investigation.  Under the right symmetry conditions, new photons are created with a frequency that corresponds to the sum of the two incident frequencies.  We then characterize this new beam to work back towards the structure of the interface, which in turn provides information on the adsorbed biomolecular structure.  A practical aspect of this experiment is that sample optics must be transparent in the visible, and throughout the mid-infrared region.
For this we use calcium fluoride (CaF2) prisms.  Del Mar Photonics has provided high-quality prisms with custom shapes according to our drawings.  One of the photos shows a close-up view of our sample cell. It is an aluminum block with internal plumbing for circulating water to maintain a constant temperature for the experiment.  Inside this block there is a teflon cell that contains the analyte solution.  An o-ring on the face of the cell interfaces to a CaF2 prism which forms the prism-solution (solid-liquid) interface on which the biomolecules are adsorbed.  In the photo, one can see a hemi-cylindrical CaF2 prism in place.  This allows the visible and infrared beams to be incident at any angle, while maintaining a horizontal plane-of-incidence.

Del Mar Photonics has provided high-quality prisms with custom shapes according to our drawings.  One of the photos shows a close-up view of our sample cell.

A second experiment uses linear optical techniques to measure all 16 elements of the 4x4 Mueller matrix of the solid-liquid interface.
This provides information on the surface roughness, thickness of the adsorbed layer, complex dielectric constant, and any anisotropy.  We
employ the same sample cell design for this experiment, using either 45-deg, 60-deg, or hemicylindrical prisms.  In cases where the Mueller
matrix characterization is performed for visible wavelengths only, we use fused silica prisms.  For infrared-only measurements, we use zinc
selenide (ZnSe) prisms.  Del Mar has been able to manufacture all shapes of prisms from CaF2, fused silica, and ZnSe according to our
custom specifications.

Dennis Hore

To request custom quote for precision optical component please e-mail us detailed specifications and drawings or check our online store for standard components available in stock:

 

CaF2
 
 

 Model   Product Name+   Price   Buy Now 
 W-CF-25.4-3   CaF2 window, ø 25.4 mm x 3.0 mm  $149.00  Buy Now 
 W-CaF-40-7   CaF2 window, ø 40 mm x 7.0 mm   $450.00  Buy Now 
 W-CF-50.8-3   CaF2 window, ø 50.8 mm x 3.0 mm   $190.00  Buy Now 
 DSP-CF-15   Dispersion prism, IR grade CaF2, 15x15x15x10 mm   $150.00  Buy Now 
 more

 

Ge optics
 
 

 Model   Product Name+   Price   Buy Now 
 E-Ge-12.7-25.4   Ge etalon, ø 12.7 mm x 25.4 mm (ø 0.5" x 1")   $790.00  Buy Now 
 W-Ge-25.4-3   Ge window, ø 25.4 mm x 3 mm   $110.00  Buy Now 
 W-Ge-38.1-4   Ge window, ø 38.1 mm x 4 mm   $250.00  Buy Now 
 more

 

ZnSe
 
 

 Model   Product Name+   Price   Buy Now 
 PH-ZnSe-25.4-12.7   ZnSe hemicylindrical prism, 25.4 mm   $1,350.00  Buy Now 
 W-ZnSe-60-3-K   ZnSe window, ø60 mm, tckn. 3 mm, coated   $620.00  Buy Now 
 W-ZnSe-12.7-1   ZnSe window, ø12.7 mm, thickn. 1 mm   $90.00  Buy Now 
 W-ZnSe-25.4-3   ZnSe window, ø25.4 mm, thickn. 3 mm   $110.00  Buy Now 
 W-ZnSe-76.2-3-K   ZnSe window, ø76.2 mm, tckn. 3 mm, coated   $700.00  Buy Now 
 more

 

BaF2 - Barium Fluoride
 
 

 Model   Product Name+   Price   Buy Now 
 WG-BF-25.4-10-1.55   BaF2 wedge, 25.4 mm x 10.0 mm x 1.55 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.1   BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.5   BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm   $129.00  Buy Now 
 W-BF-12.7-2   BaF2 window, ø 12.7 mm x 2.0 mm   $62.00  Buy Now 
 W-BF-4-0.5   BaF2 window, ø 4" x 0.5", polished, uncoated   $1,200.00  Buy Now 

 

Del Mar Photonics, Inc.
4119 Twilight Ridge
San Diego, CA 92130
tel: (858) 876-3133
fax: (858) 630-2376
Skype: delmarphotonics
sales@dmphotonics.com
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