When an instrument team picks a cooled scientific camera, the conversation usually starts with the sensor: format, pixel size, read noise, quantum efficiency. Cooling gets a line on the spec sheet and not much more. Then the first prototype goes into its enclosure, the internal air warms up, and the camera that looked great on the bench has more dark current than expected, or a fan that's fighting with the rest of the thermal design.
Cooling is an integration decision, not just a camera spec. This post walks through the three ways Finger Lakes Instrumentation (FLI) cameras can shed heat inside an OEM instrument, what each one asks of your design, and the questions worth settling before you freeze the mechanical layout. If you're still choosing a camera partner, start with our post on what to look for in an OEM camera partner.
A cooled camera lowers the sensor temperature to cut dark current, the signal that builds up in every pixel even with no light. Dark current drops steeply as the sensor gets colder, which is why cooling matters most for long exposures and low-light work such as chemiluminescence, fluorescence and low-signal inspection.
The catch is that cooling doesn't make heat disappear. It moves heat from the sensor to the back of the camera, and from there it has to go somewhere. Inside a closed instrument cabinet, next to light sources, motors and electronics, it's the part of the design that decides whether the camera reaches the temperature you planned for.
FLI cameras use thermoelectric (Peltier) coolers, often called TECs. A TEC pumps heat from its cold side, which sits against the sensor inside a sealed chamber, to its hot side at the back of the camera. Cooling performance is stated relative to the temperature of whatever carries that heat away. On our air-cooled data sheets, it's given as degrees below ambient. For example, the data sheets for our Aurora cooled CMOS cameras list cooling to 50 °C below ambient with air.
That "below ambient" wording is the key to OEM design. If the air inside your instrument runs warmer than the room, the sensor will run warmer too. So the real question isn't only how much the camera can cool, but what temperature its heat sink sees once your instrument is running.
Air cooling is standard on FLI's Aurora and Kepler cameras. Fans pull air across fins at the back of the camera and exhaust the heat.
Air cooling is the simplest choice. There's no plumbing, no chiller and nothing to leak. It works well when the camera can breathe: when there's a clear path for cool intake air and somewhere for warm exhaust to go that won't heat your optics or recirculate back to the intake.
Things to plan for:
All Aurora and Kepler cameras are plumbed for liquid circulation, with liquid cooling adapters listed as an option. Instead of dumping heat into the air around the camera, liquid carries it to a chiller or heat exchanger somewhere else in the instrument or the facility.
Liquid cooling makes sense when the enclosure is tight or sealed, when the internal air runs warm, or when you'd rather not add fan airflow next to sensitive optics. It also gives you a stable reference: the sensor temperature tracks the temperature of the liquid, so a well-controlled coolant loop gives you a well-controlled camera.
Things to plan for:
For the tightest instruments, Revelation offers a third route: mounting the camera directly to your instrument's housing, which then acts as the heatsink. Revelation shares Aurora's electronics and sensors in a form factor optimized for limited front-to-back space, and in this configuration it measures less than 55 mm front to back.
This approach removes fans and plumbing from the camera entirely, but it moves the thermal design into your hands. The housing has to conduct heat away and dump it somewhere, so its mass, material, contact surface and own cooling all affect how cold the sensor gets. Early thermal modeling pays off most here.
Whatever option you choose, one rule applies: keep cooled surfaces above the dew point of the surrounding air. A coolant loop or housing that's colder than the dew point will collect moisture on the outside of the camera, and that can lead to icing or water where you don't want it.
FLI sensor chambers are sealed and purged after assembly in our 1,000+ sq ft ISO Class 7 clean room, so the sensor itself sits in a dry environment. Anti-dew technology is listed as an option on many models and is worth considering for cold or humid installations. If condensation or ice ever appears on the sensor or window, stop cooling and contact our sales team. Continuing to cool can damage the sensor.
Some choices are built into the camera, so they belong in your first conversation with us rather than your last. The window type, for example, has to be chosen before a camera enters the clean-room build. The same goes for your cooling configuration and liquid fittings. Settling them early keeps your prototype, pilot and production units identical, which matters when you validate an instrument. If you're moving an existing design off a CCD, our guide to replacing the CCD in gel and blot imagers covers the rest of that transition, and our post on display, solar and optics inspection covers inspection lines.
Every FLI camera is designed and manufactured in the USA and tested before it ships. See how on our in-house manufacturing page. Our sensor chambers are built for extreme reliability in remote locations and OEM applications.
If you're designing a camera into an instrument, tell our sales team about your enclosure, your target sensor temperature and your space limits, and we'll help you choose between air, liquid and heatsink mounting. Request a quote or email sales@flicamera.com.
