Del Mar Photonics - Newsletter December 2010 - Newletter April 2011

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-Concave Lenses - request a quote

   Graph / Diagram
 

CaF₂ Plano-Convex Lenses - request a quote

   Graph / Diagram
 

Calcium Fluoride - CaF2

Model   Product Name+   Buy Now   BAP-CaF2-15_10   CaF2 brewster angle prism, 15 mm x 10 mm     W-CaF2-12.5-12.5-0.5   CaF2 IR grade window, 12.5x12.5x0.5 mm     W-CaF2-200-5   CaF2 IR grade window, 200x5 mm     VP-CaF-45-3-2 3/4   CaF2 viewport, 2-3/4     W-CaF2-IR-25.4-3   CaF2 window IR grade, ø 25.4 mm x 3.0 mm     W-CaF2-UV-25.4-3   CaF2 window UV grade, ø 25.4 mm x 3.0 mm     W-CaF2-40-7   CaF2 window, ø 40 mm x 7.0 mm     W-CaF2-50.8-3   CaF2 window, ø 50.8 mm x 3.0 mm     DSP-CaF2-15   Dispersion prism, IR grade CaF2, 15x15x15x10 mm     PCC-CaF2-12.7-25   IR Calcium Fluoride Plano-Concave Lens, ø 0.5", f = -25 mm     PCX-CaF2-12.7-25   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 25 mm     PCX-CaF2-12.7-50   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 50 mm     PCX-CaF2-12.7-75   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 75 mm     PCX-CaF2-12.7-100   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 100 mm     PCX-CaF2-12.7-150   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 150 mm     PCX-CaF2-12.7-200   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 200 mm     PCX-CaF2-12.7-250   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 250 mm     PCX-CaF2-12.7-300   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 300 mm     PCX-CaF2-12.7-400   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 400 mm     PCX-CaF2-12.7-500   IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 500 mm

Model	Product Name+	Buy Now
PCX-CaF2-12.7-750	IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 750 mm
PCX-CaF2-12.7-1000	IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 1000 mm
PCX-CaF2-12.7-2000	IR Calcium Fluoride Plano-Convex Lens, ø 0.5", f = 2000 mm
PCX-CaF2-25.4-50	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 50 mm
PCX-CaF2-25.4-75	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 75 mm
PCX-CaF2-25.4-150	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 150 mm
PCX-CaF2-25.4-200	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 200 mm
PCX-CaF2-25.4-250	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 250 mm
PCX-CaF2-25.4-300	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 300 mm
PCX-CaF2-25.4-400	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 400 mm
PCX-CaF2-25.4-500	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 500 mm
PCX-CaF2-25.4-750	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 750 mm
PCX-CaF2-25.4-1000	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 1000 mm
PCX-CaF2-25.4-2000	IR Calcium Fluoride Plano-Convex Lens, ø 1", f = 2000 mm

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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 µm to 9 µm. 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.

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:

Del Mar Photonics featured optical components

Del Mar Photonics continuously expands its optical components portfolio. Browse our online store, read monthly notes about our featured optical products or just send us your requirements or product ideas. 

Axicon Lens Axicon lens also known as conical lens or rotationally symmetric prism is widely used in different scientific research and application. Axicon can be used to convert a parallel laser beam into a ring, to create a non diffractive Bessel beam or to focus a parallel beam into long focus depth. Del Mar Photonics supplies axicons with cone angles range from 130° to 179.5° for use with virtually any laser radiation. We manufacture and supply axicons made from BK7 glass, fused silica and other materials. buy online - download brochure

Rutile (TiO2) coupling prisms Del Mar Photonics offers optical elements made of high quality synthetically grown Rutile Titanium Dioxide crystals. Rutile’s strong birefringency, wide transmission range and good mechanical properties make it suitable for fabrication of polarizing cubes, prisms and optical isolators. Boules having high optical transmission and homogeneity are grown by proprietary method. Typical boules have 10 - 15 mm in dia. and up to 25 mm length. Optical elements sizes - from 2 x 2 x 1 mm to 12.7 x 12.7 x 12.7 mm. Laser grade polish quality is available for finished elements. So far we the largest elements that we manufactured are 12 x15 x 5 mm, in which optical axis is parallel to 15 mm edge, 5 mm is along beam path, 12 x 15 mm faces polished 20/10 S/D, one wave flatness, parallelism < 3 arc.min. (better specs. available on request). more details - buy online - download brochure

Vacuum viewport Del Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance. Del Mar Photonics viewports are manufactured using advanced techniques for control of special and critical processes, including 100 percent helium leak testing and x-ray measurements for metallization control. Windows Materials include: Fused silica, Quartz , Sapphire , MgF2, BaF2, CaF2, ZnSe, ZnS, Ge, Si, Pyrex. Standard Viewing diameters from .55" to 1.94 ". Coating - a range of custom coatings can applied - which include - Single QWOT - Broad Band AR - V coatings - ITO - DLC (Diamond like coating) more details - request a quote

Manufacturing challenging optical components Our group works to characterize the interaction of biomolecules with solid surfaces, writes Dennis Hore of University of Victoria, Canada.  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 more For that project Del Mar has been able to manufacture all shapes of prisms from CaF2, fused silica, and ZnSe according to our custom specifications. Del Mar Photonics online store features windows, prisms, lenses, attenuators, etalons, crystals and wafers, and other items. Axicons, barium fluoride windows, germanium etalons, rutile (TiO2) prisms, microchannel plates and detectors, saturable absorber mirrors, photoconductive THz antennas, lithium niobate wafers and crystals and many other high quality affordable components for scientific research and OEM production are delivered globally from stock. Micro Prism from Del Mar Photonics - Concentrating Photovoltaics

We are looking forward to hear from you and help you with your optical and crystal components requirements. Need time to think about it? Drop us a line and we'll send you beautiful Del Mar Photonics mug (or two) so you can have a tea party with your colleagues and discuss your potential needs

Trestles LH femtosecond lasers with integrated DPSS DMPLH laser pump - DPSS DMPLH lasers