Optical Prisms are widely used to redirect light at a designated angle. They are ideal for ray deviation, or for adjusting the orientation of an image. An optical prism’s design determines how light interacts with it. When light enters an optical prism, it either reflects off an individual surface or several surfaces before exiting, or is refracted as it travels through the substrate. WISOPTIC offers a wide range of optical prisms with various designs, substrates, or coatings.
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There are four main types of prisms based on the function: dispersion
prism, deflection or reflection prism, rotating prism and offset prism.
Deflection, offset and rotating prisms are commonly used in imaging
applications; diffusion prisms are designed for dispersive light sources
and are not suitable for any application that requires high quality
images.WISOPTIC offers a wide range of optical prisms with various designs, substrates, or coatings.
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Right angle prisms
are generally used to bend image paths or redirect light at 90°. This
produces a left handed image and depending on the orientation of the
prism, the image may be inverted or reverted.
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Corner cube prisms are optics which act as corner reflectors.
The basic operation principle is that there are internal reflections on
three mutually orthogonal prism surfaces, producing a direction of a
reflected beam which is nominally parallel to the direction of the
incident beam – with the accuracy limited only by the accuracy of the
surface orientation of the prism.
Precision prisms can offer excellent parallelism of incoming and
reflecting beams.
It is usually specified as an angular deviation, e.g.
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Polarizing Beamsplitters (PBS) splits incident unpolarized light into two perpendicular linearly polarized light. Among them, p-polarized light passes through completely, while s-polarized light is reflected at 45 deg which makes the emitting direction of s-light vertical to p-light. Additionally, beamsplitters can be used in reverse to combine two
different beams into a single one. Beamsplitters are often classified
according to their construction:cube or plate.Cube PBS are fabricated using two typically right angle prisms.
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A prism, in optics, is a piece of glass or other transparent object surrounded by two planes that intersect
but are not parallel to each other. The most important parameters of a
prism are the angle and material. Prisms are capable to redirect light at a designated angle or adjust the orientation of an image. Therefore prism is useful for in certain spectroscopes, instruments for analyzing light
and for determining the identity and structure of materials that emit or
absorb light. An optical prism’s design determines how light interacts with it.
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Polarization optics is important for both intra and extra cavity use. By using high contrast thin film polarizers in their design, laser engineers can save weight and volume within the laser system without influencing the output. Compared with polarizing prisms, polarizers have larger incident angle and can be made with larger apertures. Compared with polarizers made from birefringent crystals, the advantage of thin film polarizers made from UVFS or N-BK7 is that they can be fabricated in very large sizes, therefore are
particularly well suited for high laser powers and UV wavelengths.
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RTP (Rubidium Titanyl Phosphate - RbTiOPO4) is a robust crystal material suitable for a wide range of E-O applications. It
has advantages of higher damage threshold (about 1.8 times that of
KTP), high resistivity, high repetition rate, no hygroscopic or
piezoelectric effect.
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RTP (Rubidium Titanyl Phosphate - RbTiOPO4) is a very desirable crystal material for E-O modulators and Q-switches. It has advantages of higher damage threshold (about 1.8 times that of KTP), high resistivity, high repetition rate, no hygroscopic or piezoelectric effect. As biaxial crystals, RTP’s natural birefringence needs to be compensated by use of two crystal rods specially oriented so that beam passes along the X-direction or Y-direction.
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Potassium
Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (DKDP)
are among the most widely-used commercial NLO materials, characterized
by good UV transmission, high damage threshold, and high birefringence,
though their NLO coefficients are relatively low. They are usually used
for doubling, tripling or quadrupling of a Nd:YAG laser (at constant
temperature).
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KTP (KTiOPO4 ) is one of the most commonly used nonlinear optical materials which offers a range of unique features: high optical quality, broad transparency range, wide acceptance
angle, small walk-off angle, and type I and II non-critical
phase-matching (NCPM) in a wide wavelength range.
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Basically all Pockels cell drivers are made based on
solid-state electronic technology, using high voltage transistors such
as MOSFETs.
Multiple high voltage transistors may have to be stacked, taking care to
achieve an even distribution of voltage across those.
Instead of using some heavily isolated floating gate drive circuitry for
the different transistors, one may use certain advanced ideas such as
implementing so-called avalanche switch stacks involving avalanche
diodes and/or avalanche bipolar transistors.Device lifetimes can be very long, provided that properly engineered
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A Pockels cell driver is a high-voltage regulated power supply,
either pulse or continuous, allowing to control a birefringence of an
electro-optical crystal (KTP, KD*P, BBO, etc.) in order to drive the
polarization direction of the light propagating through the crystal.WISOPTIC has developed and produces a variety of Pockels cell drivers
for different applications: from very simple compact devices for
q-switching to precise and powerful fast models for pulse picking,
cavity damping, regenerative amplifier control, etc.
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Bandpass Filters are used in a variety of industries, including machine
vision,factory automation, security and surveillance, license plate
recognition, medical and life science, agricultural inspection, aerial
imaging, motion analysis, photography and cinematography.WISOPTIC's bandpass filters include mass collection of dielectric-coated
filters, colored glass filters, neutral density filters, spatial
filters, and tunable optical filter based on liquid crystal
technology. Specifically speaking, e.g.
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Waveplates (retardation plates or phase shifters) are made from
optical materials with precise thickness such as quartz, calcite or mica, which exhibit birefringence. The velocities of the
extraordinary and ordinary rays through the birefringent materials vary
inversely with their refractive indices. The difference in velocities
gives rise to a phase difference when the two beams recombine.
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WISOPTIC provides sorts of quadric Aspheric Lens and high order Aspheric Lens, as well as infrared Aspheric Lens (ZnS, ZnSe, Ge, etc. ).WISOPTIC Capabilities - Aspheric Lens Medium PrecisionHigh PrecisionAperture5~200 mm20~1000 mmSurface Quality [S/D]< 40/20 [S/D]< 40/20 [S/D]Surface IrregularityPV< 0.5~5 µm RMS< λ/50 @ 632.8 nmAspheric Surface Type Quadric, High order Quadric, High order Manufacture Capability300 pcs/month20 pcs/year
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Optical Lenses are designed to
focus or diverge light and for imaging or alignment in an optical
system. Optical Lenses, which may consist of a single or multiple
elements, have a variety of applications. Lens forms can be divided into
simple lenses (which include plano-convex lens, plano-concave lens,
double-convex lens, double-concave lens, cylinder lens, drum
lens, spherical lens in different shapes), achromatic lenses compound
lens and multiple types.
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Characterized by the excelent UV transmission, high damage threshold,
and high birefringence, KDP (Potassium Dihydrogen Phosphate) and KD*P
(Potassium Dideuterium Phosphate) are useful commercial NLO materials
for doubling, tripling and quadrupling of Nd:YAG laser at room
temperature or an elevated temperature. They are also excellent
electro-optic (EO) crystals with high electro-optic coefficients, widely
used as electro-optical modulators and Pockels cells for Q-switched
lasers.
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Characterized by the excelent UV transmission, high damage threshold,
and high birefringence, KDP (Potassium Dihydrogen Phosphate) are commonly used commercial NLO materials
for doubling, tripling and quadrupling of Nd:YAG laser at room
temperature or an elevated temperature. KDP are also excellent
electro-optic (EO) crystals with high EO coefficients, thus popularly
used as EO modulators and Pockels cells for Q-switched
lasers.
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Compared with congruent LN (cLN) crysal, the electro-optic
coefficient, nonlinear optical coefficient, periodic polarization
reversal voltage and applied photorefractive properties of
stoichiometric LN (sLN) crystal are greatly improved. With such excellent
physical properties and wide application prospects, sLN crystal has rapidly become a competitive optoelectronic
material.sLN crystals are expected to be thermodynamically stable up to their melting temperature at 1170°C, while keeping a largerelectrical resistivity than cLN crystals by one order of magnitude at any temperature.
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E-O Q-switch based on DKDP (KD*P) crystals are one of the most popular Pockels cells in the market.Deuterated potassium dihydrogen phosphate has good transmission from
390 nm to 1400 nm (0.39 μm – 1.4 μm) and combined with high
electro-optical coefficients makes it suitable for Pockels cells.Highly deuterated DKDP
(D>99% – WISOPTIC) is necessary to reach effective electro-optical
response.
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Lithium Niobate (LN) crystal has excellent electro-optic, acousto-optic, piezoelectric and nonlinear properties. More and more attention has been paid on its application in military technology. LN crystal has large nonlinear optical coefficient and can easily achieve non-critical phase matching. As an E-O material, LN crystal has been used as an important optical waveguide material.
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KTP Crystal Features• Large Nonlinear Optical (NLO) Coefficients• Wide Phase-matching Acceptance Angle• Broad Temperature and Spectral Bandwidth• High Electro-Optic (E-O) Coefficients
• Nonhygroscopic, Good Chemical and Mechanical Properties
• Relatively High Damage Threshold for E-O modulatorKTP Crystal Applications1. SHG of Nd:Laser - KTP is the most commonly used material for
frequency doubling of Nd:YAG and other Nd-doped lasers, particularly
when the power density is at a low or medium level.
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LN crystals are nonhygroscopic and have low absorption coefficient and insert loss. In addition, LN crystal can operate stably in a wide temperature range, which makes them the main EO crystal applied in military laser systems.LN electro-optic Q-switches are widely
used in Er:YAG, Ho:YAG, Tm:YAG lasers, and are suitable for low-power
Q-switched output, especially in laser ranging. LN Pockels cells can be very compact, and the half-wave voltage can be very low. By doping MgO in LiNbO3, the damage threshold of LN Pockels cells can been increased dramatically.
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