title: An adaptive approach for uniform scanning in multifocal multiphoton microscopy with a spatial light modulator.
abstract: We propose high-quality generation of uniform multiple fluorescence spots (MFS) with a spatial light modulator (SLM) and demonstrate uniform laser scanning in multifocal multiphoton microscopy (MMM). The MFS excitation method iteratively updates a computer-generated hologram (CGH) using correction coefficients to improve the fluorescence intensity distribution in a dye solution whose consistency is uniform. This simple correction method can be applied for calibration of the MMM before observation of living tissue. We experimentally demonstrate an improvement of the uniformity of a 10 × 10 grid of MFS by using a dye solution. After the calibration, we performed laser scanning with two-photon excitation to observe fluorescent polystyrene beads, as well as the gastric gland of a guinea pig specimen.
authors: Naoya
authors: N
authors: Matsumoto
authors: Shigetoshi
authors: S
authors: Okazaki
authors: Yasuko
authors: Y
authors: Fukushi
authors: Hisayoshi
authors: H
authors: Takamoto
authors: Takashi
authors: T
authors: Inoue
authors: Susumu
authors: S
authors: Terakawa
mesh_terms: D000465:Algorithms; D000818:Animals; D005753:Gastric Mucosa / Q000166:cytology*; D006168:Guinea Pigs; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods*; D008029:Lighting / Q000295:instrumentation* / Q000379:methods; D018613:Microscopy, Confocal / Q000295:instrumentation* / Q000379:methods; D036641:Microscopy, Fluorescence, Multiphoton / Q000295:instrumentation* / Q000379:methods