Abstract: An ultra-compact lens system for fluorescence imaging includes a first lens, a second lens and third lens. The first lens has a Meniscus shape including first and second surfaces facing each other. The first surface is concave, and each of the first and second surfaces is an aspherical surface. The second lens is adjacent to the first lens and includes third and fourth surfaces facing each other. Each of the third and fourth surfaces is convex and aspherical surface. The third lens is adjacent to the second lens and includes fifth and sixth surfaces facing each other. Each of the fifth and sixth surfaces is concave and aspherical surface.

Abstract: A tissue excising system includes: a tissue ablation device including an ablation unit ablate a body tissue, and an optical signal transmission module; an image generating unit including a light source configured to provide an optical signal to the optical signal transmission module and an optical interferometer configured to receive an optical signal reflected from the body tissue from the optical signal transmission module; and a display unit configured to display an image by receiving an optical image signal from the image generating unit. The optical signal transmission module line-scans the body tissue by penetrating the optical signal from the light source to the body tissue. The optical interferometer generates the optical image signal by applying optical coherence to the optical signal reflected from the body tissue by line-scanning, and the display unit images an inside of the body tissue, using the optical image signal.