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Our pioneering optics and coating technologies also allow us to take another step further to reduce energy lost between optical surfaces. ​

In recent years the combination of array detector and spectrograph has become the system of choice for spectroscopy. Spectral Products' SM line of computer-based miniature optical spectrometers offers state-of-the-art performance yet has compact form factors. Their versatile design and ease of use make them the first choice for scientific and industrial applications. SM series optical benches are designed to provide stable operation over a wide range of ambient temperatures. SM product lines together with their accessories (light sources, filters, optical fibers, and sampling accessories) are now used throughout the world in such systems as Raman spectroscopy, emission, and excitation fluorescence/luminescence spectroscopy, arc/spark/plasma spectroscopy, spectrophotometry, spectroradiometry, laser breakdown spectroscopy, picosecond laser analysis, ratiometry, infrared measurements, color/LED measurement, process control/diagnostic/calibration and so on. Spectral Products provides a wide selection of UV/VIS/NIR(regular and back-thinned/TE-cooled CCD) and NIR/MIR (InGaAs, PbS, and PbSe) detectors, and some useful sampling accessories for their application. SP's SM miniature spectrometers are packed with great features and performance in a small footprint. The SM series spectrometers are based on a crossed Czerny-Turner configuration.

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SM spectrometers employ 2048 pixels Si-CCD (Sony ILX511), 3648 pixels Si-CCD (Toshiba TCD1304), 1024 pixels back-thinned TE cooled CCD (Hamamatsu S7031-1006), 2048 pixels back-thinned CCD (Hamamatsu S10420-1106-10), 256/512 pixels multiplexed InGaAs (Hamamatsu G9204, G9206, and G9208 series), 256 pixels PbS/PbSe detector arrays (IR Materials) with high sensitivity. A sensing element height of 200nm to 1,050nm (CCD)/0.9μm to 1.7μm (InGaAs) or up to 2.5μm (extended InGaAs)/ 1.0μm to 3.0μm (PbS)/1.5μm to 5.0μm (PbSe) maximizes the detector light collection capability. For UV and near IR regions where regular silicon CCD detector response is inherently weak, we provide a variety of sensitivity enhancement coatings for detector arrays. Every IR range detector is thermoelectrically cooled and temperature stabilized to ensure long-term operational stability.

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Hey yuan, Iam need to see how the polarization effects the interference. how can i set a polarizer such that only S-polarised beam is transmitted. I tried to define ideal2 coating on a cylinder and placed on beam path. But i cant see the effect of places polariser. Could you please help with this regards?

From the figure below, (1) goes in the Z direction, but the electric field oscillates in the Y direction, thus becoming Y-polarized light (linearly polarized light in the Y direction).

S = skip.  HPOL light vibrate sideways, and skips off the surface with almost zero penetration.  Think of a pencil held sideways, then thrown toward the surface.  It hits the surface with the pencil sideways, and reflects the sideways pencil away.

S = skip.  HPOL light vibrate sideways, and skips off the surface with almost zero penetration.  Think of a pencil held sideways, then thrown toward the surface.  It hits the surface with the pencil sideways, and reflects the sideways pencil away.

More information about S and P polarization states: How does OpticStudio define the s- and p-polarization states? | Zemax Community

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If you want to polarize light in a specific direction, you can model it by setting the polarization state of the light source + reference axis + rotation of the light source.

The plane formed by the incident light vector and the boundary normal vector is called the incident plane. When the electric field oscillates perpendicular to the incident surface, it is defined as s-polarized light or TE-polarized light. When the electric field oscillates parallel to the plane of incidence, it is defined as p-polarized light or TM polarized light. S is a vertical word in German with the acronym Senkrecht. p stands for parallel.

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P = penetrate. Think of a sewing machine needle, going up and down in a vertical direction, penetrating cloth.  That's what the E field is doing to the optical surface.

In Zemax, the local coordinates used to define the polarization state of the light source are Jx (the energy corresponding to the S component) and Jy (the energy that defines the P component).

- Semiconductor industry process diagnostics - Light source/Sample spectrum analysis - Color/Fluorescence measurement - Biology/Chemistry/Biochemistry/Medical applications - Food and Agriculture/Pollution measurement - Chemicals/Plastics/Polymers analysis - Petrochemicals/Pharmaceutical analysis

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Connections between the spectrometer and the computer interface are made via a shielded electrical cable. Detector arrays are also included in the same housing in handheld versions. SM spectrometers can be interfaced with computers via USB, and ethernet. Especially, our USB and ethernet interfaces give our SM series spectrometers some of the most effective high data acquisition speeds available.

If you want to set it to X-direction polarization as a prerequisite for light propagation in the Z direction, you need to choose a Y-axis reference.

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When linearly polarized in a specific direction, the light source can be rotated by an angle, thus changing the polarization direction of the resulting light.

P = penetrate. Think of a sewing machine needle, going up and down in a vertical direction, penetrating cloth.  That's what the E field is doing to the optical surface.

Similarly, if the light source is polarized in the Y direction, you can choose an X-axis reference so that there is no component in the Ex direction.

By use of SP's unique linear variable long pass filters in SM spectrometers, a wide, simultaneous wavelength coverage is achieved, free of higher-order interference.

(2) It advances in the Z direction, but because the electric field oscillates in the X direction, it becomes X-polarized light (linearly polarized light in the X direction).

We offer various ruled and holographic gratings depending on the wavelength range. Also, several slits are available for various resolutions and throughput.