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360C Ultra Miniture Rotating Optical Chopper |
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 Features
 Scitec Instruments Model 360 optical chopper system
consists of a chopper head, drive board, photochemically etched discs and an
interconnecting cable. This optical chopper uses 30mm diameter discs. The drive
board and chopping head have been designed to be as compact as possible. The
small size of the chopping head allows positioning in areas where space is
critical. As the system is designed for OEM use, each component is available
separately.
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10 Hz - 14,000 Hz standard chopping frequency range
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30 mm diameter discs |
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Photochemically etched non-magnetic discs |
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Ultra compact chopper head |
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Small size drive board |
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Low cost, for OEM applications |
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Specifications
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360H Chopping Head
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Motor: 5 pole DC motor, sleeve bearings with more than
5000 hours lifetime, 0-15000 rpm reversible. |
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Reference pick-up: IR led and phototransistor pair
with Schmitt trigger. |
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Dimensions: 43(H) x 30(L) x 14(W) mm without blade.
Dimensions: 50(H) x 30(L) x 30(W) mm with blade. |
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Mounting: Two 3 mm holes near base. |
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360C OEM Drive Board
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Input Voltage: 7V to 15V DC or 9V to 18V AC |
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Frequency Control: On board trim, external
potentiometer or external voltage |
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Frequency Stability: Short term - see phase jitter.
Long term - ±1% of max frequency within 10 to 100% of maximum
frequency. |
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Reference output: 5 V HCT TTL signal via jack
socket. |
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Power Requirement: 60mA no load, 80mA max
speed |
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Dimensions: 43 x 73 mm |
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Weight: 25 g |
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350D Set of Chopping Discs
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Disc types: 2, 4, 10 and 40 slot
(20 and 80 slot
discs are also available) |
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Material: Half hard brass, 0.3 mm thick |
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Diameter: 30 mm |
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Surface Finish: Chemically blacked |
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Mark to Space Ratio: 1 to 1 |
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 Frequency Range:
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Disc |
Frequency (Hz) |
Aperture (mm) |
Phase Jitter, Max |
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r |
a |
b |
d |
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350D2
(2 slots) |
10 - 350 |
9.0 |
23.6 |
9.4 |
9.0 |
TBA |
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350D4
(4 slots) |
20 - 700 |
9.0 |
11.8 |
4.7 |
8.3 |
TBA |
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300D10
(10 slots) |
50 - 1750 |
8.0 |
4.4 |
1.9 |
3.7 |
TBA |
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300D20
(20 slots) |
100 - 3500 |
8.0 |
2.2 |
0.94 |
2.0 |
TBA |
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300D40
(30 slots) |
200 - 7000 |
8.0 |
1.1 |
0.47 |
1.0 |
TBA |
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300D80
(80 slots) |
400 - 14,000 |
5.0 |
0.55 |
0.35 |
0.5 |
TBA |
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Ordering Information
The 360 system is available as separate components as most
customers require only some of the following parts:
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360C OEM |
- Drive board |
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360H |
- Chopping head |
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360I |
- Interconnecting lead, 1 m in length |
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350D2 |
- Two slot 30mm disc |
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350D4 |
- Four slot 30mm disc |
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350D10 |
- Ten slot 30mm disc |
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350D20 |
- Twenty slot 30mm disc |
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350D40 |
- Forty slot 30mm disc |
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350D80 |
- Eighty slot 30mm disc |
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350D |
- Set of 4 discs (350D2, 350D4, 350D10 &
350D40) |
Please note, a complete system also requires a wall mounted power
supply which is available from many sources. |
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Useful Documents
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360H
Chopping head dimensions and wiring - pdf (13K) |
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360C OEM
Drive board dimensions and wiring - pdf (19K) |
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