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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Eye Contact Lens. 2009 Nov;35(6):302–308. doi: 10.1097/ICL.0b013e3181bdc435

Figure 1.

Figure 1

(A) The modified HRT-RCM prototype. A threaded housing on the HRT which is normally rotated by hand to change the focal plane position within the cornea was removed (inset) to allow the front housing of the microscope to move freely. Two rubber bands were used to apply a constant rearward force to this front housing. A linear actuator (Oriel Encoder Mike) was then attached to the side of the microscope, and coupled to a stainless steel “drive shaft” which was connected to the back of the front housing. The actuator was connected to an Oriel 18011 Encoder Mike controller. (B) In this prototype instrument, two PCs are used during scanning. Image acquisition is accomplished using the normal HRT software (HRT PC), and focusing is controlled using the arrow keys on a separate keyboard (PC2), using modified “CMTF” software. The software continuously displays the position of the focal plane with respect to the tip of the TomoCap (zoomed inset).