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David Garber Tuesday, May 25th: Set up system on Balaji's optical rail, test hologram of 20 micron particles, too small. Dust on optical elements comes into focus nicely however-! Wednesday, May 26th: Moved system to unused optical rail, re-setup. Placed lens in front of camera to counter-act camera lens which cannot be removed. Researched camera, strange pixel arrangement. Laser ran out of batteries, so we connected it to a variable power source set at 4.5V. Thursday, May 25th: Test hologram of algae. The algae is naturally fuzzy, so result is not very sharp. Still unsure of what to use for actual pixel size in Jian Sheng's reconstruction program, 'Digirecon' (the Super CCD chip in this camera has two different pixel sizes, both hexagonal [later discovered that this is not true; only one type of hexagonal pixel, but oriented at 45 degrees]). Friday, May 28th: Test hologram of ants, too large for field of
view. Returned camera. Wednesday, June 2nd: Researched removable-lens cameras. Cheapest option was around $800. Decided we will just have to deal with adjusting for the lens by placing another lens in front. Reserved Fujifilm Finepix camera again for next Monday. Thursday, June 3rd: Calculated pixel spacing as 5.6 microns for the Finepix camera [later updated this calculation to 3.7 microns]. For next week, since I don't know the actual position of the lens in the camera I am going to have to do some trial and error to get the lens in front of the camera positioned correctly. Friday, June 4th: Planned to go get copepods, but instead will
go next week. Updated pixel calculation.. Click Here to continue... |
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