Laser optical chopper-Fornitore globale

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Laser optical chopper

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Optical Chopper

The main function of an optical chopper is to modulate continuous light into light with a fixed frequency, while outputting the modulation frequency. Usually used in conjunction with lock-in amplifiers. Optical chopper generally consists of the following components: control unit, chopper device, chopper plate, and connecting wires.

Model-C995 optical chopper

Product Overview：

C-995 is designed specifically for laboratory useOptical chopper with multiple uses.
The C-955 is equipped with a five digit LED digital display, which can directly input the chopping frequency required by the customer in digital form through the front end of the control panel through the controller. In addition, the RS-232 bidirectional port equipped on the C-955 allows users to set the resolution of the required chopping frequency to 0.001Hz, while also being able to understand the condition of the chopper during use.
The C-955 adopts a phase-locked loop control system, which enables the chopping frequency to synchronize with the external clock provided by the user within the range of 4Hz to 5KHz. At this point, the controller can be used to obtain the frequency of the external clock.
The C-955 chopper head is controlled by a 10 turn potentiometer, where the blades are precisely closed to protect the chopper head from accidental danger. There are two apertures and two components (30 apertures and 3 apertures) on the chopper head, which are respectively used for the high-frequency and low-frequency parts. The hole diameter is 15mm, and the hole width is 4.5mm (30 holes) and 15mm (3 holes).
The small square shaped hole with a side length of 4.75 inches and a depth of two inches makes it easy to match with the optical bracket. Two # 8-32 assembly holes allow the height of the holes to be as low as 0.75 inches. When used in conjunction with a 1/2 inch support rod, the height can reach up to 13 inches.

characteristic:

Frequency range from 4Hz to 5000Hz

Robust crystal frequency control

5-digit LED digital display

Frequency resolution up to 1mHz

External synchronous clock

Single chip coverage frequency adjustment range of 4Hz-5KHz

Equipped with computer interface for easier control

Closed blade chopper head effectively prevents accidental damage to the blades

C-995 Optical Chopper Specification
Chopping frequency range	4Hz-500Hz (inner slot), 40Hz-5KHz (outer slot)
Aperture size	Diameter 15mm
frequency control	Phase locked loop, direct digital synthesis
The uncertainty of frequency	Set ± 0.0025%
Phase jitter	0.1% peak to peak value, 3 slots; 1.0% peak to peak, 30 slots
Set lock time	<3 seconds
Clock input requirements	TTL, CMOS compatible square wave, 4Hz~5000Hz
Synchronous signal output	TTL, CMOS compatible square wave
display	High brightness green five digit display
Chopping frequency temperature coefficient	<10ppm/℃
frequency resolution	0.001Hz
Frequency resolution (front control panel)	0.01Hz
Resolution of externally controlled counter	0.1Hz，1Hz
Rs-232 interface	9600 Baud, N-8-1,3 wire
Installation of chopper head	Standard 8-32 threaded hole
Diameter of chopper blade	4.1 inch
Working temperature range	0～40℃
Joint size	114mm ×114mm ×51mm
Controller size	69mm×178mm×231mm
Power requirements	95-260VAC，50-60Hz，15VA Max
CE certification	yes
weight	1.36 Kg

SR540 type optical chopper

The SR540 optical chopper is a product of SRS Corporation in the United States. The product adopts a dual frequency design with inner and outer holes and can achieve dual frequency operation in a specified mode, which is very convenient for application in dual beam optical experiments.