April 15, 2020

Everything to Know About the Use of Microlens Array in Photography

Do you have any idea how many lenses you depend on for taking those precise and clarity-enhanced pictures on your digital camera? If you think only about the lenses mounted on your camera, your answer will be limited to 5-25 elements. However, if you consider the entire camera system, it will be millions of small, individual lenses that help you capture those beautiful images. Among them, the array of miniature lenses that are placed on the top of your camera’s sensor are microlenses that help channelize the incident light into the photosites of your camera’s sensor.

The micro lens was primarily created for the video and still cameras of the earlier days but now they are widely used in the advanced DSLRs for perfect sensoring.

Let’s now shed some light on the benefits of using a microlens in advanced photography.

The function of the microlens in the camera sensor

The advanced digital cameras originally don’t have light-sensitive sensors, as the structure takes up a lot of space in the equipment. Therefore, most of the incident light may be lost, which is reversed by placing the microlens array in this area. These lenses channelize the light into the light-sensitive zone of the camera, thus reducing the loss of light and increasing the camera’s efficiency. The more light the photosites receive, the higher is the sensitivity of the sensor. Further, it increases the ratio of the light to the unwanted signals, which helps in reducing noise, thus enhancing clarity in the resultant images.

However, there are certain drawbacks that one must be aware of. Purple fringing is one such issue where the resultant image shows purple tinges in the high contrast borders, especially when the image is taken in a low-light situation. This apart, the sensitivity of the pixels is dependent on the lens’ aperture, which impacts the incoming light angle, causing the light rays to strike an area that isn’t photo-sensitive.

You should be careful about these issues while using a high-quality DSLR and so some research on how to minimize them.

What more should you know about microlenses?

The microlenses can be of varied shapes and forms ranging from hexagonal to circular but are mostly arranged in a square or hexagonal grid. They help in laser homogenization, beam focusing and splitting, sensing wavefronts, high sensitivity imaging, laser processing, detection and enhancing laser beauty. However, the application of these lenses depends on numerous parameters like size and the materials of the lenses, shape of the microlenses and the shape of their arrangement, the cycle, focal length and radius of curvature, not to forget the type of surface of the lenses, whether it’s continuous or discontinuous.

You can get your hands on different types of microlenses from a reliable manufacturer and even customize them to meet your specific preferences. Make sure you check the material of the lenses before buying and ensure that it’s of the highest standards.