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1. Introduction
The CELESTA light engine consists of individually addressable solid-state laser light sources with integrated
electronic control systems. The outputs of the laser light sources are refined by bandpass filters and
merged into a common optical train directed to the light output port on the front panel. The light output port
has a built-in adapter for connection to an SMA-terminated optical fiber. An onboard photodiode array
continuously monitors the light output and generates a reference signal that is applied to the constituent
sources in a feedback loop to maintain constant light output over time. The light sources within the
CELESTA light engine are controlled by software; via one of two serial interfaces, USB/RS-232 or TCP, to an
onboard microprocessor operating Lumencor firmware. The user can enable or disable each source
independently by serial commands as well as change the intensity of each source independently. The
CELESTA light engine can be controlled by third party microscopy data acquisition software or by a GUI
resident on the onboard microprocessor. Alternatively, the light sources may be turned on and off by TTL
inputs from a trigger device such as a camera or a real-time controller. Optimal internal operating
temperature is maintained by negative pressure air cooling with the air intake at the front of the light engine
and the exhaust fan at the rear.
CELESTA Light Engine
®
Instruction Manual
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