The SC-3 type sub-miniature fixed frequency resonant optical scanners is THE NON-MEMS VERY SMALL SIZE mechanical scanner available. It is an electromagnetically driven moving mirror device, which deflects a light beam with a continuous sinusoidal motion. The mirror assembly is attached at the center of a taut band spring. The scanning frequency range of the SC-3 type scanner, or of the smaller size version SC-3-SH, is from 100Hz to 1860Hz, fixed at any one value within the range. The scan angle is inversely proportional to the frequency, and is a function of the mirror size. The standard operating temperature is 0°C to +55°C. Other temperature range and vacuum operation are available upon request.
High device "Q" insures frequency stability and low electrical drive power. High flexural stiffness provides good resistance to shock and vibration, as well as low wobble, and good scan repeatability. Resonating at the natural frequency makes the device an excellent candidate for long life operation for a multitude of applications which require good imaging with minimal distortion. The scanner is especially suitable for dedicated, high volume, OEM industrial applications. The SC-3 type scanner can easily be incorporated in small size and portable instruments.
The operation of the scanner at the resonant frequency is sustained by a positive feedback amplifier type ED driver or the AGC driver. The AGC driver provides a higher amplitude stability (0.01%) and a position output signal.
Applications include: Can be used as an intra cavity Q-Switch, confocal microscopy, cancer diagnosis, ophthalmic imaging, adaptive optics, X-ray technology, DNA sequencing, brain imaging, detecting cognitive recognition, dentistry, dermatology, developmental biology, NDE/NDT, oncology and high resolution imaging of optical coherence microscopy (OCM), laser scanners, image and pattern forming and recognition, high resolution printing, fluorescent microscopy, confocal microscopy, semiconductor imaging, web inspection, biomedical imaging, quality inspection, process verification, mask inspection, machine vision and outer space and environmental to name a few.
ONE FIXED FREQUENCY from the range of 100Hz to 1000Hz. The following should serve as guidelines only.
| SCAN ANGLE (P-P deg opt) | MIRROR SIZE (mm) | FREQ. (Hz +/-10%) | |
| SC-3-2 | 50° | 6 dia | 250 |
| SC-3-2 | 50° | 7x7 | 180 |
| SC-3-2 | 50° | 12x7 | 110 |
| SC-3-3 | 40° | 6 dia | 400 |
| SC-3-3 | 40° | 7x7 | 285 |
| SC-3-3 | 40° | 12x7 | 180 |
| SC-3-4 | 30° | 6 dia | 600 |
| SC-3-4 | 30° | 7x7 | 430 |
| SC-3-4 | 30° | 12x7 | 265 |
| SC-3-5 | 20° | 6 dia | 830 |
| SC-3-5 | 20° | 7x7 | 600 |
| SC-3-5 | 20° | 12x7 | 385 |
SPECIFICATIONS
SCANNER:
SC-3 size (in inches): 0.9 x 0.5 x 0.4
SC-3-SH size (in inches): 0.55 x 0.5 x 0.4
Scan frequency range: 100 Hz to 1000 Hz
Frequency accuracy: +/-10% at 25°C, closer accuracy available upon request
Scan angle: to 50° peak to peak optical as a function of frequency and mirror size.
MIRROR:
Sizes: 6mm diameter, 7×7mm, 12×7mm
Thickness: 1.0mm, standard; other thickness values available
Flatness: 1/4 wavelength (for 6mm and 7x7mm mirrors), 1/2 wavelength for 12x7mm mirror
Surface quality: scratch and dig: 60-40.
ELECTRICAL:
Drive coil resistance: 950 ohms
Sense coil resistance: 950 ohms
Cable lengthof the SC-3-SH: 8 inches
Connector: female 4 pin plug on 0.1 inch centers, Molex P/N 22-01-3047 or equiv.
ORDERING INFORMATION
TYPE [SC-3 or SC-3-SH]; MIRROR SIZE [mm]; ANGLE [P-P Deg. optical]; FREQUENCY [Hz]
Example: PART NO. SC3-7x7-20-600. This part number specifies the model SC-3 scanner, a 7mm x 7mm mirror, a 20° peak to peak optical scan angle and a 600 Hz operating frequency.
