Lcd Screen; Shutter Operation; Intensity Tuning; External Control - THORLABS HPLS301 User Manual

Free-Space Plasma Light Source
5.2.

LCD Screen

The normal operation screen is show in Figure 6:
Light Intensity
Shutter State:
Open/Close
 The percentage on the upper left corner of the screen represents the intensity setting that determines
how much of the available power from the bulb is coupled into the LLG.
 On the upper right corner, the control mode is displayed. "Manual" means that the light source is operated
via the front panel while "External" means that the light source is controlled via the I/O port on the back
panel.
 On the bottom left corner, the shutter state is displayed.
 On the bottom right corner, the current state of the device is shown.
5.3.

Shutter Operation

The shutter of HPLS300 series is closed by default. After Initialziation, press the shutter button to open/close the
shutter. When shutter is open, the shutter state LED will be ON.
Do NOT look directly into the light output port to avoid any eye damage due to the strong intensity
5.4.

Intensity Tuning

After initialization, turn the knob under the LCD screen to adjust the output light intensity of the light source.
Intensity tuning does not affect the current level driving the bulb. Instead, it determines the state of an attenuator
placed between the bulb and the light output port.
During tuning, the intensity percentage display on the LCD screen will change accordingly.
The HPLS301 light source features an intensity tuning function with a range of 1.5% to 100%, with a setting
resolution of 0.1%. The tuning knob is functional regardless the state of the shutter (closed or open).
5.5.

External Control

The HPLS300 series can also be controlled by sending a votage signal to the ports on the back panel of the
device. To enable this external control function, press the external control button on the front panel. The button
has an LED which will be ON when the external control mode is enabled.

5.5.1. External Shutter Operation

The shutter can be controlled via the "SHUTTER CONTROL" port on the back panel. The female BNC port
accepts 5 V CMOS singal. A high logic state will open the shutter and a low logic state will close the shutter.
Port Name
SHUTTER CONTROL
Page 8
Operation Screen
WARNING
of output light.
Connector Signal Type
BNC Female 5 V CMOS
Control Mode:
EXTERNAL/MANUAL
State of the Device and Warning
Messages
Signal definition
Open: high logic state, 3.5 to 5 V
Close: low logic state, 0 to 1.5 V
Chapter 5: Operation
CTN011675-D02