I require a cheap and small computer to act as the monitor of a webcam-microscope. The computer must be able to display the output of the USB webcam microscope with as low a time delay as possible (<50ms delay) and display the output on a monitor with a wired connection (HDMI, DVI or VGA). The computer, USB microscope and monitor are intended to be placed inside a biosafety hood much like this one. It will allow the user to be able to view and manipulate small objects under the microscope without needing to lift the glass safety sash, as one will need to do when using a normal binocular microscope. I have considered the Raspberry Pi for this purpose, but my question on the RBP SE seemed to suggest that it may not be fast enough for this purpose. My requirements are as follows:1: The computer must introduce less than 50ms of delay when displaying live images from a USB webcam with a resolution of 720p. 2: Under US$400 not including the monitor and microscope3: Have at least one form of hardware video output and have at least one USB port. 4: Preferably fanless, as fans may disrupt the airflow within the biosafety cabinet. 5: Preferably has integrated Wifi and Bluetooth for remote access to save data without needing to place USB drives into the biosafety cabinet. One method to quantify the webcam time delay would be to point your webcam directly at the computer monitor, and observe the nesting of images. The rate at which the images nest into each other allows the approximate time delay to be measured. 
Recommendation for a cheap and small computer for USB webcam microscope
usb;scientific instruments