title: Achieving magnification smaller than 1 in lensless microscopy by illumination with a convergent wavefront.
abstract: Lensless or lensfree microscopy is now available commercially. With these new microscopes, it is possible to record images in contact mode with a magnification of 1 or in holographic mode with a magnification larger than 1. In this Letter, we present an original setup that allows us to record the image of an object whose surface is larger than that of the image sensor without placing an optical component between the object and the image sensor.
authors.forename: François
authors.initials: F
authors.lastname: Perraut
authors.forename: Mickaël
authors.initials: M
authors.lastname: Doménès
authors.forename: Henri
authors.initials: H
authors.lastname: Grateau
authors.forename: Quentin
authors.initials: Q
authors.lastname: Josso