mikrolinssimenetelmä

The mikrolinssimenetelmä, which translates to "microlens method" in English, is a technique used in optics and microscopy to enhance the resolution and light-gathering capabilities of imaging systems. It involves the incorporation of an array of microscopic lenses, or microlenses, into the optical path. These microlenses are typically placed either in front of or behind the primary imaging lens, or sometimes integrated directly into a sensor or detector.

The primary function of the microlens array is to redirect light rays that would otherwise miss the active area of the detector or be lost due to diffraction. By focusing these off-axis or weakly diffracted rays onto the detector pixels, the overall efficiency of light collection is increased. This leads to brighter images, particularly in low-light conditions. Furthermore, the microlenses can be designed to compensate for aberrations and distortions introduced by the main lens, thereby improving image sharpness and clarity.

In digital imaging sensors, such as those found in cameras and scientific instruments, microlenses are commonly placed over each photodiode. This allows each pixel to capture more light, improving signal-to-noise ratio and enabling higher frame rates or better performance with smaller pixel sizes. The mikrolinssimenetelmä has found applications in various fields, including digital photography, microscopy, and the development of specialized optical components.