METHOD AND APPARATUS FOR DETERMINING A FOCAL POSITION OF AN IMAGING DEVICE ADAPTED TO IMAGE A BIOLOGIC SAMPLE

摘要

A method and apparatus for focusing a device for imaging a biologic sample is provided. A method aspect of the disclosure includes the steps of: 1) disposing lenslets within a field of a biologic sample, which lenslets have a height, and have a refractive index and which refractive index is different from that of the sample, wherein one or both of the imaging device and the sample are relatively locatable so a focal position of the imaging device can be moved along the height of the lenslets; 2) imaging at least a portion of the sample including a plurality of lenslets using transmittance at one or more predetermined wavelengths; 3) determining an average light transmittance intensity of the sample at the wavelengths; 4) determining an average light transmittance intensity of a region of each lenslet at the wavelengths; and 5) determining the focal position of the imaging device using the average light transmittance intensity of the sample and the average light transmittance intensity of the region of the lenslets.