A solar cell module has a chamber and includes a solar cell device, a gelfluid, and a light-focusing unit. The random pattern can be convolved with a second pattern, such as a biometric pattern, to produce a phase convolved mask. The device may be, for example, a video capsule from medical technology, such as for endoscopy. For making a T-Cap just the lower part of any pill-box cap goes once in the press-machine.