Hello! I have an aspheric lens and I need to know the parameters of this lens, for that I need to know the surface's equation, can I use MATLAB to know the lens coordinates?

Answer 1

[yanqi liu]

yes，sir，may be use image segment to get the edge，and then use fit_ellipse to get the parameters，such as

im = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1003500/image.jpeg');
bw = ~im2bw(im);
bw = imclearborder(bw);
bw = bwareafilt(bw,1);
bw2 = imclose(bw, strel('disk', 19));
bw2 = imfill(bw2,'holes');
bw2 = imclose(bw2, strel('disk', 100));
be = bwperim(bw2);
figure; imshow(be);

then，we can get the edge location，and get ellipse

a: 300.8214

b: 293.0813

phi: 0.3815

X0: 69.8848

Y0: 941.7797

X0_in: 415.5356

Y0_in: 848.0348

long_axis: 601.6429

short_axis: 586.1626

status: ''

[Khalil Sabour]

Thanks a lot !

but the problem is that i need to find the lens surface equations, not only the base ( the ellipse )

[Khalil Sabour]