Del Mar Photonics -
Newsletter
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.
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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.
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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+ | Buy Now |
| W-CF-25.4-3 | CaF2 window, ø 25.4 mm x 3.0 mm |
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| W-CaF-40-7 | CaF2 window, ø 40 mm x 7.0 mm |
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| W-CF-50.8-3 | CaF2 window, ø 50.8 mm x 3.0 mm |
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| DSP-CF-15 | Dispersion prism, IR grade CaF2, 15x15x15x10 mm |
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| more |
| Ge optics | |
| 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") |
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| W-Ge-25.4-3 | Ge window, ø 25.4 mm x 3 mm |
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| W-Ge-38.1-4 | Ge window, ø 38.1 mm x 4 mm |
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| more |
| ZnSe | |
| Model | Product Name+ | Buy Now |
| PH-ZnSe-25.4-12.7 | ZnSe hemicylindrical prism, 25.4 mm |
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| W-ZnSe-60-3-K | ZnSe window, ø60 mm, tckn. 3 mm, coated |
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| W-ZnSe-12.7-1 | ZnSe window, ø12.7 mm, thickn. 1 mm |
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| W-ZnSe-25.4-3 | ZnSe window, ø25.4 mm, thickn. 3 mm |
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| W-ZnSe-76.2-3-K | ZnSe window, ø76.2 mm, tckn. 3 mm, coated |
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| BaF2 - Barium Fluoride | |
| 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 |
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| WG-BF-25.4-10-2.1 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm |
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| WG-BF-25.4-10-2.5 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm |
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| W-BF-12.7-2 | BaF2 window, ø 12.7 mm x 2.0 mm |
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| W-BF-4-0.5 | BaF2 window, ø 4" x 0.5", polished, uncoated |
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Del Mar Photonics continuously expands its components portfolio
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Solar
Prisms for Concentrating Photovoltaic Systems (CPV) Solar cells made of compound semiconductors such as gallium arsenide are very expensive. Usually very small cells are installed and various means such as mirrors, lenses, prisms, etc..are used to concentrate sunlight on the cells. Concentration photovoltaic technology (CPV) uses the solar radiation with an efficiency of 40%, double that of conventional solar cells Del Mar Photonics design custom Concentrating Photovoltaic Systems (CPV) and supply variety of the optical components for CPV such as solar prisms shown in the picture. hexagonal light pipes, optical rods High Concentration Photovoltaic Panel (HCPV) - request for information Solar Glass reflectors & optics for solar power generation & solar heating Ultrafast studies of charge carrier dynamics in nanomaterials and relevance to solar energy conversion CdTe Solar Cells |
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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. download brochure - request a quote |
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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 - download brochure - request a quote - properties incl. refractive index - buy online Cylindrical and hemispherical lenses from rutile TiO2 Rutile retroreflectors - PBS Rutile windows TiO2 single crystal - quote - TiO2-5-5-20 TiO2 single crystal AR 700-900 nm - TiO2-5-5-20 TiO2 single crystal AR 1500-1700 nm Rutile prisms in production: Brewster angle rutile (TiO2) prism - applications |
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Lithium Tantalate (LiTaO3) Lithium Tantalate exhibits unique electro-optical, pyroelectric and piezoelectric properties combined with good mechanical and chemical stability and , wide transparency range and high optical damage threshold. This makes LiTaO3 well-suited for numerous applications including electro-optical modulators, pyroelectric detectors, optical waveguide and SAW substrates, piezoelectric transducers etc. LiTaO3 wafer SAW grade - Lithium Tantalate, LiTaO3 - crystal - elements for pyroelectric detector - EOM - EO crystal - wafers - Lithium Tantalate Substrates for Pyroelectric Detectors - y-cut LiTaO3 - LiTaO3 properties - Electro – Optic Pockels Cells - Optical Waveguide Substrates - Pyroelectric Detector Substrates - Piezoelectric Transducers - wafers- Lithium Tantalate frequency filter - detector - Lithium Tantalate wafers and crystals - LiTaO3 thin substrates - cylindrical z-cut LiTaO3 crystal - online store |
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Sapphire components Sapphire Circular Windows - Square & Rectangle - Rods Sapphire & Ruby Rings - Sapphire & Ruby Balls - Sapphire & Ruby Nozzles Sapphire Lenses - Ball & Seat - Special Products - Sapphire Vee & Cup Jewels Sapphire Ceramics - Ceramic Sleeves - Ceramic Holes - Ceramic Rods Sapphire & Ruby Orifices - Sapphire & Ruby Tubes - Sapphire Components Sapphire Half Round Rod - Sapphire Windows - Rods ＆ Tubes - Special Part Sapphire Prism - 5x5x5 - Sapphire Chisel - Sapphire Square Rod Sapphire rods for HPLC: Agilent Technologies - Beckman Coulter, Inc. - Cecil Instruments - Dionex Corp - Hitachi, Ltd. - PerkinElmer, Inc. - Shimadzu Scientific Instruments - Thermo Fisher Scientific - Varian, Inc. - Waters Corporation |
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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 - High-Vacuum System for High Power Lasers - AR Coated Zinc Selenide Vacuum Viewport |
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Zinc Selenide optical components |
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NARROW-BAND HOLOGRAPHIC FILTERS are intended for suppression of powerful beams in research and in engineering, in particular, in laser spectroscopy, and also for protection from blinding and damaging by laser radiation various photo receiver devices and operator's eyes. Unlike conventional interference filters, which are made by vacuum evaporation techniques, holographic filters are fabricated by recording interference patterns formed between two mutually coherent laser beams. Since all layers are recorded simultaneously within a thick stack, the optical density of the notch filter is high and its spectral bandwidth can be extremely narrow. Also, since the layering profile is sinusoidal instead of square wave, holographic notch filters are free from extraneous reflection bands and provide significantly higher laser damage thresholds.
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Hydrogen
Thyratrons are used in such devices as radars with
different power levels, high-power pulsed technical, electrophysical,
medical devices and lasers. Sophisticated design and high quality
ceramic-metal envelope determines long lifetime and very accurate and
reliable operation of hydrogen thyratrons under wide range of environmental
conditions.
DMPTGI 1-50/6 Applications: - radars - pulsed lasers power supplies - medical apparatus - electrophysical instrumentation - ignitors Triggered Three-Electrode Spark Gap Switches are ceramic-metal sealed off gas discharge trigatron-type devices with a co-axial trigger electrode. These Gas Discharge Tubes contain no mercury and, due to an advanced design, feature high reliability and a long lifetime being operating under wide range of environmental conditions. Applications: - pulsed installation for processing materials - installations with plasma focus - pulse power supplies for lasers and other pulse equipment - medical apparatus such as lithotriptors and defibrillators - processing systems for petroleum wells |
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Spark gaps for variety of applications Hydrogen Thyratrons - Deuterium Thyratrons - Untriggered Spark Gaps - Triggered Spark Gaps - X-ray tube - DMPTGI 1-50/6 - RU-62-TSG - RU-77-TSG - RU-69-TSG - High Voltage Pulse Trigger transformer DMPTT511A Ignitor for Igniting a 250W Xenon ARC Flyback type trigger transformer to operate spark gap - quote Triggered spark gaps with standoff of up to 40 kV, a peak current of around 10 kA, a pulse energy of 100 J, and a pulse rep rate of 20 Hz |
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DMPTGI 1-50/6 thyratron request a quote Anode voltage: 1-6 kV Reverse anode voltage: 0.5-1.5 kV Anode current in pulse: 50 A Anode current average: 0.12 A Current anode impulse time:0.2-4.0 microseconds Steepness of anode current pulse edge: 0.25 x 109 A/s Pulse repetition rate: 1100 pulse/s Warm-up time: 3 minutes Heater current: 7 A Diameter: 50 mm Height: 76 mm NOTE: Thyratron operate at pulse repetition rate to 50000 pulse/s on condition of decrease pulse and average power. |
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Trigger Transformers Del Mar Photonics supply trigger transformers for triggered spark gaps and other applications. Contact us to today to discuss your application or requesta quote. Trigger Transformers are used to provide a fast high voltage pulse up to 30kV/µs and more. This high voltage pulse is applied to the trigger electrode to initiate switching action in the three-electrode spark gaps. Either positive or negative pulses can be obtained from all of the transformers. |
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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. |
Del Mar Photonics, Inc.
4119 Twilight Ridge
San Diego, CA 92130
tel: (858) 876-3133
fax: (858) 630-2376
Skype: delmarphotonics
sales@dmphotonics.com
