boyfriendnibluefairy.github.io

Apps, Software, & Libraries

Cat Radar

Cat Radar is a free app that utilizes Machine Learning to detect cats. Powered by Apple’s CoreML, the app works without internet connection and does not collect user data.

cat_radar

*You may download the app in App Store

Westeros Map

Westeros Map is a free companion app for those who read George R.R. Martin books and for those who watch Game of Thrones or House of the Dragon. It has the combined power of UIKit and SwiftUI so that user can explore Westeros and Essos with awesome animation and dynamic search list.

westeros_map

Papyrus Offline

Papyrus Offline is a free paperless registration app that can be used in recording the attendance of participants in conferences, seminars, symposiums, talks, etc.

Papyrus_Offline_screenshots

openphoton

openphoton is a free python package for optical wave propagation

openphoton_features

FEATURES:

This README.md file is under construction. But the steps presented below is sufficient for you to simulate light propagation from a laser, passing through lens, and passing through your test object. More features will be added soon.

Examples of How To Use (Alpha Version)

Add openphoton to your operating system or python virtual environment

pip install openphoton

Create a laser beam

import openphoton as op

# side length (m)
# aperture radius (m)
u0 = op.devices.laser_beam(
    side_length=0.06,
    aperture_radius=0.026)

In order to forward propagate the wave field, you must choose between fresnel (near-field) approximation and fraunhoffer (far-field) approximation. To determine which approximation is best for your system, you have to calculate the Fresnel number F_N. If F_N = [1, +infinity], then use fresnel approximation. Otherwise, use fraunhoffer approximation.

# uo = wave field to propagate
# L = source plane side length (m)
# wavelength = wavelength of light (m)
# z = propagation distance (m)
# u1 = resulting wave field after propagation
u1 = op.rayleigh_sommerfeld.fresnel_approx(
    u0, L, wavelength, z)

Apply converging lens or diverging lens on the laser beam

import numpy as np

# u1 = wave field before the lens
# L = u1 side length (m)
# wavelength of light (m)
# f_length = lens focal length (m)
# u2 = wave field after the lens
u2 = np.multiply(u1, op.lenses.converging_lens(u1,L,wavelength,f_length))

Apply SLM or test object on the laser beam

import numpy as np

# filename = image of test object file name
filename : str = "USAF_1951_1024p.png"

# SLM_amplitude() converts RGB image into numpy array
# pixel_size = number of pixels of image, ideally this must be the same with u1
test_object = op.devices.SLM_amplitude(filename, pixel_size)

# u1 = wave field before the test object
# L = u1 side length (m)
# wavelength of light (m)
# u2 = wave field after the test object
u2 = np.multiply(u1, test_object)

References: