Del Mar Photonics - Newsletter

Type: hemicylindrical prisms - request a quote
Material: Fused Silica IR grade
Height 25.4 mm (+/-0.2 mm),
Radius: 12.7 mm (+/-0.1 mm),
Center thickness: 12.7 mm (+/-0.1mm)
Angular deviation: +/-3 arc min,
2 faces polished: SQ 60-40 scr-dig
Other faces: fine ground.
Coating: none
Part number: IRFS_hemicyl_prism_25.4_12.7

Buy online or request a quote

Certificate of conformity

Model	Product Name+	Buy Now
DSP-FS-20	Dispersion prism, UV FS, 20x20x20 mm
DVP-FS-20	Dove prism, UV FS, 20x20x82 mm
PH-FS-25.4-12.7	FS hemicylindrical prism, 25.4 mm
RRF-FS-1-1	Retro-Reflector, UV FS, ø 25.4 mm, BBAR 400-700 nm
RRF-FS-1.5	Retro-Reflector, UV FS, ø 38.1 mm
RRF-FS-2.5	Retro-Reflector, UV FS, ø 63.5 mm
RAP-FS-10	Right angle prism, UV FS, 10x10x10 mm
RAP-FS-12	Right angle prism, UV FS, 12x12x12 mm
RAP-FS-15	Right angle prism, UV FS, 15x15x15 mm
RAP-FS-20	Right angle prism, UV FS, 20x20x20 mm
RAP-FS-30	Right angle prism, UV FS, 30x30x30 mm
RAP-FS-5	Right angle prism, UV FS,  5x5x5 mm

CaF₂ hemicylindrical prisms

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:

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

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

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

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

Model	Product Name+	Buy Now
DSP-FS-20	Dispersion prism, UV FS, 20x20x20 mm
DVP-FS-20	Dove prism, UV FS, 20x20x82 mm
PH-FS-25.4-12.7	FS hemicylindrical prism, 25.4 mm
RRF-FS-1-1	Retro-Reflector, UV FS, ø 25.4 mm, BBAR 400-700 nm
RRF-FS-1.5	Retro-Reflector, UV FS, ø 38.1 mm
RRF-FS-2.5	Retro-Reflector, UV FS, ø 63.5 mm
RAP-FS-10	Right angle prism, UV FS, 10x10x10 mm
RAP-FS-12	Right angle prism, UV FS, 12x12x12 mm
RAP-FS-15	Right angle prism, UV FS, 15x15x15 mm
RAP-FS-20	Right angle prism, UV FS, 20x20x20 mm
RAP-FS-30	Right angle prism, UV FS, 30x30x30 mm
RAP-FS-5	Right angle prism, UV FS,  5x5x5 mm

Other fused silica optics

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.

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