Hi Cahyadi,
I thought I might give you a little further feedback,
I like your design but wondered if we could use a more abstract symbol for the hourglass, same position but perhaps skewed so that it appears a laser beam is projecting from the tail of the Tau character, cutting through the center of the hourglass (which perhaps sits behind the 'o') the beam is dotted as it then connects to the 'R'.
Other notes that might help:
I plan to use the logo on the side of my product, the logo location format is a rectangle 22 mm x 9.5 mm
The logo must fit comfortably within this format
The GaTor device has a black anodized aluminium surface
I would prefer the hourglass concept incorporated into the GaTor4D text
There could be a space between GaTor and 4D
The hourglass concept can be more symbolic, ie curves suggestive of hourglass shape.
Possible to use two characters or more to incorporate the concept of pulse excited luminescence / laser / hourglass
thanks for your great efforts
Russell