THORLABS SH05 Operating Manual page 7

Ø1/2" Beam Shutters
Timing Performance
TI, Transfer Initialize: Time from the application of an energizing voltage to the
initial movement of the shutter.
TO, Transfer Open: Time for the shutter to move from 20% exposed to the 80%
exposed. This is measured across the 0.5" travel distance of the shutter.
TD/R, Transfer Dwell/Release: Time from the removal of the holding voltage or
pulse to the point where the shutter begins to close.
TC, Transfer Close: Time for shutter to close from an 80% exposure to 20%
exposure.
MSOP*, Minimum Shutter Open Time: Minimum shutter open time using the
MOP from the SC10 controller.
MOP, Minimum Open Pulse: Minimum pulse width of SC10 controller.
Note: The shutter SH05 is not meant for operation in critical timing applications.
Performance may vary from unit to unit.
Typical Performance
The SH05 is capable of operating at a sustained maximum rate of 25 Hz with a
minimum on time of 10 ms. As programmed exposure times (open times) increase
to beyond 20 ms the dominant characteristics of magnetic distortion, TI, and TD/R,
as shown in Fig. 1, become constants. The net effect of this anomaly is that the
delay from the control pulse (or trigger) to the shutter opening is 5 ms, and the duty
cycle distortion incurred is ±5 ms. As an example: If the SC10 is programmed for
100 ms open and 100 ms close time, the result would be a 105 ms exposure and
a 95 ms closure on the SH05.
Rev D, March 16, 2020
Event
TI
TO
TD/R
TC
MSOP*
MOP (SC10)
TIME (ms Typical)
8.0
3.0
13.0
4.08
27.0
10
Chapter 3: Description
Page 5