unevenness of exposure
曝光不均匀性

• Helmholtz's reciprocity theorem
• Helmholtz telesterscope
• hemeralopia
• hemianopsia
• hemiconcentric resonator
• hemiconfocal resonator
• hemicrystalline
• hemi-ellipsoidal mirror
• hemihedral field
• hemihedry
• hemisphere
• hemispheric
• hemispherical candle power
• hemispherical cavity
• hemispherical inmmerison lnes
• hemispherical integration
• hemispherical mirror
• hemispherical resonator
• hendecagon
• he-Ne Lasers
• henry
• heptagon
• heptalateral
• heptode
• herapathite