The effect of magnetic field on temperature and temperature profile of diffusion flame is
investigated by using circular grating Talbot interferometer. Talbot interferometric fringes are …

A new laser differential reflection-confocal focal-length measurement (DRCFM) method is
proposed for the high-accuracy measurement of the lens focal length. DRCFM uses weak …

A method based on the Fresnel diffraction of light from the phase step is introduced for
measuring effective focal length (EFL) and back focal length (BFL) of optical imaging …

A new laser differential confocal focal-length measurement method is proposed for the
measurement of an ultra-long focal-length. The approach proposed uses the property of an …

A figure measuring interferometer (FMI) method is proposed for high-accuracy measurement
of the focal length and distortion of optical systems simultaneously. FMI uses the Zernike …

A new accurate method for long focal-length measurement based on Talbot interferometry is
proposed. A divergent beam and two Ronchi gratings of different periods are employed, as …

We present what we believe is a new technique for the focal-length measurement of positive
lenses using Fizeau interferometery. The technique utilizes the Gaussian lens equation. The …

In this paper, a new calibration method for accurate long focal-length measurements, based
on Talbot interferometry, is presented. Error analysis is derived in detail by the numerical …

In present communication, a simple technique for determining the focal length using moiré
deflectometry has been proposed. Necessary mathematical premise expressing the focal …

The lens phase provides useful information about the optical path length, from which other
key parameters of a lens can be calculated. Yet, the traditional 2D detector-based phase …