1. Pulse stretching of Q-switched lasers

   • W. R. Callen
   • R. H. Pantell
   • J. Warszawski

   Papers Pages: 123 - 127

2. Spatial filters for pattern detection and image enhancement

   • Jack J. Burch

   Papers Pages: 128 - 133

3. A method for producing controllable double pulses from a Q-switched laser

   • A. R. Newbery

   Papers Pages: 134 - 137

4. The thin lens equation for optical parametric image conversion

   • A. H. Firester

   Papers Pages: 138 - 142

5. Opto-electronic properties of heterojunctions—A review

   • T. L. Tansley

   Review Article Pages: 143 - 150

6. Periodic resonant reflectors with chosen peak reflectivity

   • H. F. Mahlein
   • G. Schollmeier

   Letters Pages: 151 - 152

7. Approximate photon-counting distribution for thermal light

   • P. R. Pearl
   • G. J. Troup

   Letters Pages: 152 - 154

8. Further results on the range gating technique: Visibility in sea water

   • S. Donati
   • A. Sona

   Letters Pages: 155 - 159

9. The dispersion of the refractive indices of proustite (Ag₃AsS₃)

   • M. V. Hobden

   Letters Pages: 159 - 159

10. Announcement

    Announcement Pages: 160 - 160