Introduction to Concave Microlens

What is/are Concave Microlens?

Concave Microlens - In this work, we proposed a concave microlens array (MLA) on an encapsulation layer to enhance the angular color uniformity (ACU) of color-mixed light-emitting diodes (cm-LEDs). ^[1] An ultra-smooth diamond concave microlens array was realized using a chemical reflow process assisted by dry etching technique, which has a great performance for homogenization of light beam. ^[2] A rapid and single-step method for the fabrication of a zinc selenide (ZnSe) concave microlens array through the high-speed line-scanning of a femtosecond laser pulse is presented. ^[3] Flexible concave microlens arrays with a well-controlled curvature can be fabricated straightforwardly using a leaky dielectric via the electrowetting-on-dielectrics phenomenon for potential miniaturized and high-performance flexible optical micro-devices. ^[4] Plasma treatment on PVA patterned with microtopographies was also studied, with only the concave microlenses topography demonstrating a significant increase in platelet adhesion. ^[5] A concave microlens mold was first fabricated on a fused silica substrate using femtosecond laser irradiation followed by a wet etching process, and a standard replication process was employed to fabricate a PDMS convex lens array. ^[6] We develop a facile, fast, and cost-effective method based on the electrowetting effect to fabricate concave microlens arrays (MLA) with a tunable height-to-radius ratio, namely aspect ratio (AR). ^[7] We demonstrate the design and simulation of intense light beam (ILB) achieved by concave microlens engraved lenticular fibers. ^[8] Here, an ultra-smooth sapphire concave microlens-array-based homogenizer, which is fabricated by dry-etching-assisted femtosecond laser machining, is proposed for shaping high-fluence pulsed laser beam to a flat-top profile intensity distribution. ^[9]

concave microlens array

In this work, we proposed a concave microlens array (MLA) on an encapsulation layer to enhance the angular color uniformity (ACU) of color-mixed light-emitting diodes (cm-LEDs). ^[1] An ultra-smooth diamond concave microlens array was realized using a chemical reflow process assisted by dry etching technique, which has a great performance for homogenization of light beam. ^[2] A rapid and single-step method for the fabrication of a zinc selenide (ZnSe) concave microlens array through the high-speed line-scanning of a femtosecond laser pulse is presented. ^[3] Flexible concave microlens arrays with a well-controlled curvature can be fabricated straightforwardly using a leaky dielectric via the electrowetting-on-dielectrics phenomenon for potential miniaturized and high-performance flexible optical micro-devices. ^[4] We develop a facile, fast, and cost-effective method based on the electrowetting effect to fabricate concave microlens arrays (MLA) with a tunable height-to-radius ratio, namely aspect ratio (AR). ^[5]