Recent content by TJULICHEN

For this problem, I analyzed it using the concept of a phase mask (screen function). When light passes through a medium with a gradually varying refractive index, a phase mask function can be defined as P(y) = \exp[i\,k\,n(y)\,L] where k = 2\pi/\lambda is the wavenumber, n(y) is the refractive...

Thank you so much for your prompt and precise reply. I truly appreciate it!

Thank you very much for your response. I have sketched a diagram to illustrate the situation. The refractive index of the glass varies along the y-direction, and the light is incident perpendicularly on the end face of the glass, which is a standard rectangular block and is isotropic. The...

Thank you very much for your response. I have sketched a diagram to illustrate the situation. The refractive index of the glass varies along the y-direction, and the light is incident perpendicularly on the end face of the glass, which is a standard rectangular block. The deflection direction of...

I'm often confused about when it's appropriate to use geometric optics (ray tracing) and when it's necessary to switch to wave optics and analyze the wavefront instead. For example, in many interference problems, the conclusions derived from ray tracing are often correct—even though...

Please forgive me, as I am still confused about one issue and hope you can help me clarify it. Suppose I have several point sources of spherical waves (treated as scalar waves) distributed in the XOZ plane, with no other objects in the space. When calculating the phase distribution on a...

Thank you for your answer; it has been very helpful！

"Thank you very much for your answer. I now have a general understanding."

Thank you very much for your answer; i.e., to calculate the diffracted field accurately, should I still use the Kirchhoff integral solution? Unfortunately, in most books deriving Fourier optical elements, for example, deriving the quadratic phase factor function of a lens, is based on the...

In Fourier optics analysis, is it reasonable to multiply the wavefront function by the screen function of the diffraction screen to obtain the wavefront distribution behind the screen? This approach seems to yield results that differ from those obtained using the Kirchhoff diffraction integral...

“大家好，我很高兴以新成员的身份加入论坛。我是一名来自中国的大学生，主修光学物理。在学习期间，我遇到了很多困难，尽管查阅了各种资源，但还是找不到满意的答案。因此，我想向论坛的专家寻求建议。我将表示诚挚的谢意，并严格遵守论坛规则。” translated into English: Hello, everyone, I am very pleased to join the forum as a new member. I am a university student from China, majoring in optical physics. I have...