title: High-quality generation of a multispot pattern using a spatial light modulator with adaptive feedback.
abstract: We propose and demonstrate high-quality generation of a uniform multispot pattern (MSP) by using a spatial light modulator with adaptive feedback. The method iteratively updates a computer generated hologram (CGH) using correction coefficients to improve the intensity distribution of the generated MSP in the optical system. Thanks to a simple method of determining the correction coefficients, the computational cost for optimizing the CGH is low, while maintaining high uniformity of the generated MSP. We demonstrate the generation of a 28×28 square-aligned MSP with high uniformity. Additionally, the proposed method could generate an MSP with a gradually varying intensity profile, as well as a uniform MSP consisting of more than 1000 spots arranged in an arbitrary pattern.
authors.affiliation: Hamamatsu Photonics K K, Central Research Laboratory, Hamakita-Ku, Hamamatsu-City, Japan. nm@crl.hpk.co.jp
authors.forename: Naoya
authors.initials: N
authors.lastname: Matsumoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Inoue
authors.forename: Taro
authors.initials: T
authors.lastname: Ando
authors.forename: Yu
authors.initials: Y
authors.lastname: Takiguchi
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Ohtake
authors.forename: Haruyoshi
authors.initials: H
authors.lastname: Toyoda