Better Light, Inc. was an American company that manufactured digital backs for large format film cameras.
[1][2] The Better Light scan back was a device designed to make it possible to capture digital photographs using traditional 4x5 large format film view cameras, copy stands, and microscopes by replacing the 4x5 film holders that they used.
The Better Light utilized a high-resolution line scanner that scanned the image plane in place of where a sheet of 4x5 film traditionally went.
This approach was in contrast to sensors used in contemporary digital cameras that capture the entire image at once.
Current Pixelshift technology achieves the same result in Bayer filters, which is the most common type of sensor used in dSLRs today.