Our superb vendor PG&O has a nice feature over at Photonics.com.
PG&O makes a dichroic mirror for us to use in the Nano eye tracker. It is a cold plated mirror that is shaped by a waterjet. Another component is the two sided mirror that shines light onto the pupil and reflects the eye image up to the camera’s image guide. This system allows the patient to view visual stimulus as well as track their eye movements.