{"type":"rich","version":"1.0","title":"透镜及其应用","provider_name":"Coggle","provider_url":"https://coggle.it","thumbnail_url":"https://static.coggle.it/diagram/YMcQ7sP8u1roRmAD/thumbnail","width":1920,"height":1200,"html":"<iframe width=\"1920\" height=\"1200\" src=\"https://embed.coggle.it/diagram/60c710eec3fcbb5ae8466003\" frameborder=\"0\" allowfullscreen></iframe>"}