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Light Choppers
Intercept current or beams of radiation on a periodic basis.
See Also: Light Sources, Optical Heads
- Taylor Dynamometer, Inc.
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Towing Dynos for Full-Sized Cars & Light Trucks
Designed to maintain 2,248 to 5,620 lb (10,000 to 25,000 N) of constant drawbar pull, our towing dynamometers for full-sized cars to light trucks are powered by an industrial generator to provide unlimited testing at low speeds. Each model features aluminum frame, independent suspension, aero dynamic body and wireless touchscreen controller.
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High Speed Optical Choppers
The Optical Choppers offered by Hinds Instruments are resonant devices designed to work at one frequency. We offer two ways to chop light: a High Speed Optical Chopper (HSOC) and a Photoelastic Modulator (or PEM).
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Optical Components for Custom Spectroscopy
HORIBA offers a wide variety of optical accessories. We have optical choppers which pulse continuous light sources. Explore our order sorting filter wheels for spectrographs and monochromators. Choose from our optical fibers and light guides, with flexible light delivery, single fibers, fiber bundles, and liquid light guides. And select from our lens and mirror-based sample compartments.All of these accessories are compatible with our various optical components. Our optical accessories allow us to complete a custom solution for your unique configuration requirements and a variety of spectroscopy applications. HORIBA offers more choices to ensure you can select the best optics for your needs.
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Detection Electronics
Our detection electronics portfolio comprises all the detection electronics elements required for the operation and automation of a high quality light measurement system, including photo-detector signal recovery and digitisation (with fully programmable DC, AC and lock-in amplifiers having current/ voltage inputs), high voltage supply, optical chopper control, detector thermoelectric cooler control and relay unit.
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Digital Static Field Meter
Model 715B
- Assess electrostatic fields or charge on objects- Measures up to ±19.99 kV at a distance of 1 inch- Accuracy of <±5% in both normal and ionized environments- Uses a chopper stabilized sensor- LED ranging lights for positioning the meter at the right distance- Zero function allows the display to be adjusted to zero (0)- Hold feature to lock the reading on the display- Low battery indicator on the display- 1-year limited warranty
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Detection Electronics
Our detection electronics portfolio comprises all the detection electronics elements required for the operation and automation of a high quality light measurement system, including photo-detector signal recovery and digitisation (with fully programmable DC, AC and lock-in amplifiers having current/ voltage inputs), high voltage supply, optical chopper control, detector thermoelectric cooler control and relay unit.
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Electrostatic Fieldmeter
Model 775
The pocket-sized Simco-Ion Model 775 Handheld Electrostatic Fieldmeter is designed to locate and measure static charge potentials on product, people, equipment and packaging. The Model 775 Fieldmeter uses a non-contacting, chopper stabilized field sensor and a ranging light mechanism to ensure correct measurements of electrostatic fields in all areas—even those using air ionization.
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Resonant Chopper Systems
Electro-Optical Products Corp.
An external clock signal, to provide an ultra stable modulating optical beam motion [sub] system. The system can be used as a "stand alone" unit, in the laboratory, or can be incorporated into a larger instrument/system. The chopper is ONE FIXED FREQUENCY, picked from the range of 5 Hz to 20 kHz. The chopper is a small size, light weigh, low cost and long life device. It requires low power drive electronics and does not radiate electromagnetic interference (EMI). It has high frequency stability and high amplitude stability. The chopper is IR, VIS and UV and high vacuum capable. Reference signal and position output available.
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Rotating Optical Chopper
300C and 300CD
Scitec Instruments Model 300 is a high stability variable frequency optical chopper. The basic system consists of a control unit, a chopping head and a set of four chemically blacked photo etched discs. This system provides operation over the frequency range 5Hz to 3kHz.
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Ultra Miniature Rotating Optical Chopper
360C
A small compact low cost system suitable for OEM use. 10 Hz - 14,000 Hz standard chopping frequency range.
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Saluki SE3001 Optical Chopper (1Hz - 10kHz)
SE3001 Optical Chopper is high-precision optical equipment with its chopper frequencies from 1 Hz to 10 kHz. With the advantage of PID technology and high-quality motor, the frequency accuracy of SE3001 is up to 0.5%. SE3001 consists of a console, a chopper head and a control line. The main function of the console is to control the speed of the motor to achieve the target speed. The chopper head is mainly composed of a base and a motor with a blade.
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Light Meters
Light Meters are used to measure the light output of an illumination source for a number of optical applications. Light Meters are measurement devices that feature photodiodes to determine the level of light transmitted from a source. Light Meters possess simple, easy to read screens upon which measurements are displayed in one or more photometric units. Most Light Meters possess traceable NIST certification for proof of accuracy.
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Light Meter
PLMT56
Light Meter Measures In LuxOver-Range IndicatorLong-Life Silicon Photo Diode InsideMeasurement Rate: 1.5 Times per SecondMax Range: 50,000 LuxAccuracy: +/- 5% Under 10000 Lux, +/- 10% Over 10000 LuxMax Resolution: 0.1 LuxDimensions: 7.40' H x 2.52' W x 0.96' DAccessories Included: 12V A23 Battery, Photo DetectorSold as : Unit
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Light Sources
For applications such as transmission, absorption, and reflection, illumination sources are needed. Avantes offers a wide range of different types of light sources, to suit your specific application needs. An overview of the different types of light sources can be found below.
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Light source
UVM-MP
Measurement of maximum of 6 points is possible. By use of thee sensor amplifier box, distance between the light receiving inlet and the controller can be extended to 10 meters. Measurement start signals can be independently output by remote control. This is useful for the light source fixtures integrating shutter mechanism.
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Optical Chopper
These high stability variable frequency optical choppers each include a set of chemically blackened photoetched chopping discs. The mini chopper is an excellent choice for applications requiring a compact package. The chopping discs come in a variety of slot apertures and allow operation. Beam diameter is limited to 0.75mm when using the 200-slot disc and 1.0mm when using the 40 slot mini disc. The easy-to-interchange blades are made of non-magnetic, half hard brass and can be used in combination. Chopping frequency is set by adjusting a ten-turn dial or by applying an external DC voltage to the BNC input. Reference output is a TTL pulse and is in-phase with chopping action. The 5 digit led display gives a direct read-out of the chopping frequency. Power: 90-130V or 180-260V; 50/60Hz; 12VA max. Power supply included. Choppers are often used together with lock-in amplifiers.
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Light Source
UVF-205S
By use of the light guide with the quartz sensor fiber, feed-back control and monitoring of UV irradiation intensity is possible. Also setting of UV intensity and meaurement by personal computer is possible
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Light Meters
An instrument for measuring the intensity of light, used chiefly to show the correct exposure when taking a photograph.
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Light Sources
Modular sources are available for illumination, excitation and calibration, with options for UV, Visible and NIR wavelengths.
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Light Meters & Sensors
The light meters and sensors product line at Gamma Scientific is extensive. Find sensors, light meters, photometers, radiometers, reference standard detector systems, and transimpedance amplifiers that meet your testing requirements.
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Light Source
A light source essentially is an optical transmitter that is paired with an optical receiver, both of which are connected to electrically based devices or systems. So, the source converts electrons to photons and the detector converts photons to electrons.
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Mode-Conditioned Light Sources
Thorlabs' Mode-Conditioned Light Sources are fiber-coupled LED sources that have an output with a flat-top profile in the far field. Common applications include the testing of multimode fused fiber components as well as verification of modal behavior in fiber-based setups. Standard fiber-coupled LED sources can have a range of output profiles that are usually not uniform and vary from source to source. This can be dependent on emitter orientation, alignment with fiber tip, and connector assembly. These mode-conditioned sources have been engineered to distribute light evenly into all transverse modes, resulting in an equilibrium modal distribution at the output. The front panel includes an adjustment knob to control the power and an output port that accepts 2.2 mm wide-key FC/PC connectors. A DS15 15 V power supply with a location-specific plug is included with each device.
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Forensic Light Source
CrimeScope CS-16-500W
The flagship of the SPEX Forensics Product Line, the CS-16-500W was designed for those departments that prefer the power and IR capabilities of 500W Xenon lamps.
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Short Light Source
LM-AS
The short light source is compatible with the LM-101 or the LMC-20. The light is supplied with a 50 watt tungsten halogen convection cooled light source which provides suffcient energy for use with narrow band pass filters or monochronomators in the wave length range of .35 to 2.5 microns. The light beam is chopped at 200 hz by a quiet, vibration free, synchronous motor. The housing also contains a secondary LED light source and detector for synchronization of the amplifier, plus an electro-mechanical shutter to block the light output when the instrument is zeroed. An internal collimating lens produces a narrow beam (<1") so the LM-AS can be used in bell-jar and large coating systems.
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Light Measurement Detectors
International Light Technologies
ILT detectors are designed to emit low levels of current in the pico-amp to milli-amp range which is then converted to calibrated optical units such as lux, W, W/cm2, etc., when used with ILT light meters. Detector assemblies typically include a sensor, filter, optic and calibration.
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Light Metering System
Isolight
Peripheral Vision has developed the Isolight and Isolight Color light metering systems. The Isolight combines four photopic light sensors, a 100-LED chaser display, a flexible chart holding system, and multiple mounting options. The Isolight Color replaces the Isolight's luminance-only sensors with four full-color RGB sensors for measuring both illumination color and brightness. Both the Isolight and Isolight Color will greatly accelerate image quality testing and enhance the accuracy of your measurements.
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Light Meter
DL1076
Switchable between LUX and FC (footcandles)Auto-rangingAuto-zero at turn-onDisplay hold functionAnalog output (2 VDC F.S.)
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Light Meter
Ideal for measuring mercury, xenon, metal halide or fluorescent lamps, commonly used for studies in the UVA region, as well as sunlight.
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Light Source
FiberPal OT-3000
The OT-3220/3221 is designed for a high performance stabilized laser source, especially in practice for FTTX networking installation and maintenance fieldworks environment requirements. It is usually applied as stable laser sources for wide range of optical testers and tools in optical fiber cabling and transmission systems.
