Pythonで円と四角を描画する

顕微鏡の視野とTVアダプタレンズの関係を描画するプログラムを作った。

結果

プログラム

# 27_FNwithTVlens_001.py
# python 3.8.1
# coding: utf-8

import matplotlib.pyplot as plt
import matplotlib.patches as patches
import numpy as np

#============#
# Parameters #
#============#
W = 6.9
H = 5.2

#=============#
# Draw images #
#=============#

# Field of View
circ22 = patches.Circle(xy=(0, 0), radius=22/2,   ec='black', fill=False)
circ26 = patches.Circle(xy=(0, 0), radius=26.5/2, ec='black', fill=False)

# TV lens 1X
rect = patches.Rectangle((-W/2, -H/2), width=W, height=H, ec='r', fill=False)

# TV lens 0.35X
W035 = W / 0.35
H035 = H / 0.35
rect035 = patches.Rectangle((-W035/2, -H035/2), width=W035, height=H035, ec='b', fill=False)

# TV lens 0.5X
W05 = W / 0.5
H05 = H / 0.5
rect05 = patches.Rectangle((-W05/2, -H05/2), width=W05, height=H05, ec='g', fill=False)

# TV lens 0.65X
W065 = W / 0.65
H065 = H / 0.65
rect065 = patches.Rectangle((-W065/2, -H065/2), width=W065, height=H065, ec='orange', fill=False)

ax = plt.axes() 
ax.add_patch(circ22)
ax.add_patch(circ26)
ax.add_patch(rect)
ax.add_patch(rect035)
ax.add_patch(rect05)
ax.add_patch(rect065)

ax.axis('scaled')
ax.set_xlim(-14, 14)
ax.set_ylim(-14, 14)
ax.set_xticks(np.arange(-14, 14), minor=True)
ax.set_yticks(np.arange(-14, 14), minor=True)
plt.grid(which='both', axis='both', color='gray', alpha=0.3)
plt.show()

参考サイト

https://tomowarkar.com/python-matplotlib-circle/
matplotlibでのプロットの基本 - Qiita