Optics theory;

Lamp design including following parts.

a. Reflector

b. Lens

Reflector basically from 2 theory

ecllipse

parabola

Parabola formula Y^2=4*F*X

(X,Y) are coordinate position.

However the focus filament is not a spot.  it is a pieces of bar.  The filament for H3 is length of 5.0X1mm,   The H4 is length of 5.5mmX1mm.

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So use computer to analysis the output light beam direction.  Make it parallel to X axis.  The more horizontalized will make the curve  more accurated.

eclipse -

That's for projector light.

Lens Fluting Design-

Lens maker's law 1/f=(n-1)(1/c1+1/c2)

c1=Br=Positive

C2=Cr=negative------ Get the focus.

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