Beta Ray Diagram Widget

How to read it

Light travels left to right and meets the convex front of the lens first. A real object sits to the left, so its incident vergence L is negative; the lens adds its power (L′ = L + F) and the image forms where L′ sends the light, measured from the back vertex. Objects nearer than about 6 m (20 ft) are drawn as a tree; more distant objects, near optical infinity, become the Orion constellation. A real image is drawn with solid rays, a virtual image with dashed rays.

Units:

Ray diagram

Ray diagramA thin lens of power +5.00 D images an object placed 50.0 cm to its left. Incident vergence is -2.00 D; vergence leaving the lens is +3.00 D. The image forms 333.3 mm (13.12 in) from the back vertex, and is real, inverted, minified at 0.67×.FF′objectimage
A thin lens of power +5.00 D images an object placed 50.0 cm to its left. Incident vergence is -2.00 D; vergence leaving the lens is +3.00 D. The image forms 333.3 mm (13.12 in) from the back vertex, and is real, inverted, minified at 0.67×.

Readout

Lens power+5.00 D
Incident vergence-2.00 D
Vergence leaving lens+3.00 D
Image distance (back vertex)33.33 cm (333.3 mm · 13.12 in)
Magnification-0.67×
Imagereal, inverted, minified