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Minor Versionm

by Procheta Mallik

Introduction

A periscope is an instrument for observation over an object, obstacle etc that prevents direct line-of-sight observation from an observer's current position.

    • Scissors have functional sharp edges. Contact may result in injury. Always keep blades away from fingers and body. Handle with care.

  1. Take a printout of periscope template attached below. Place two templates, page 1 towards your right side and page 2 towards your left side, as shown in the image and join them using clear tape on the plain side. Apply paper glue on the template.
    • Take a printout of periscope template attached below.

    • Place two templates, page 1 towards your right side and page 2 towards your left side, as shown in the image and join them using clear tape on the plain side.

    • Apply paper glue on the template.

  2. Paste the template on A3 size cardboard sheet. Cut along the dotted lines. Crease along the solid bold lines using a scale as shown.
    • Paste the template on A3 size cardboard sheet.

    • Cut along the dotted lines.

    • Crease along the solid bold lines using a scale as shown.

  3. Flip the template, fold along the creased lines as shown. Make the template into a box by joining the same numbered flaps/sides together, e.g, 1 joins to 1. Paste the flaps together using glue.
    • Flip the template, fold along the creased lines as shown.

    • Make the template into a box by joining the same numbered flaps/sides together, e.g, 1 joins to 1.

    • Paste the flaps together using glue.

  4. Now the body of the periscope is ready. Cut along the dotted . Cut along the dotted .
    • Now the body of the periscope is ready.

    • Cut along the dotted .

  5. Fold along solid bold lines. Now, take the flap and fold 'C' strip onto 'B' strip, 'A' strip onto 'B' strip , you will get a double up strip. Paste it using a paper glue.
    • Fold along solid bold lines.

    • Now, take the flap and fold 'C' strip onto 'B' strip, 'A' strip onto 'B' strip , you will get a double up strip.

    • Paste it using a paper glue.

  6. Fold along solid bold lines. Using paper glue, paste the 5cm by 5cm mirror onto the square where flaps are attached as shown. Repeat the same procedure to make another mirror holder and peel of the transparent sheet attached onto the mirror.
    • Fold along solid bold lines.

    • Using paper glue, paste the 5cm by 5cm mirror onto the square where flaps are attached as shown.

    • Repeat the same procedure to make another mirror holder and peel of the transparent sheet attached onto the mirror.

  7. Match the numbers on controlling flaps and the periscope, join them together with help of insulation tape. Match the numbers on controlling flaps and the periscope, join them together with help of insulation tape. Match the numbers on controlling flaps and the periscope, join them together with help of insulation tape.
    • Match the numbers on controlling flaps and the periscope, join them together with help of insulation tape.

  8. Tape the controlling flaps to the body of periscope on both outter edge and inner edge. Take a printout of protractor scale and cut along the outline of the scale as shown using scissors. Take a printout of protractor scale and cut along the outline of the scale as shown using scissors.
    • Tape the controlling flaps to the body of periscope on both outter edge and inner edge.

    • Take a printout of protractor scale and cut along the outline of the scale as shown using scissors.

  9. Glue the protractor scale to the periscope as shown. Now, insert the controlling flaps through the rectangular slits made. Follow the same procedure to attached another mirror hold onto the tube.
    • Glue the protractor scale to the periscope as shown.

    • Now, insert the controlling flaps through the rectangular slits made.

    • Follow the same procedure to attached another mirror hold onto the tube.

  10. Consider the lower opening as the eye piece and the other opening as the objective. Place the eye piece near your eye and adjust it, until you see a image on the objective mirror. Try varying the angle of objective mirror and look at the image.
    • Consider the lower opening as the eye piece and the other opening as the objective.

    • Place the eye piece near your eye and adjust it, until you see a image on the objective mirror.

    • Try varying the angle of objective mirror and look at the image.

    • With help of the periscope , look at a object. ( here we are looking at upper knob of the window).

    • Note down the angle of eye piece mirror and angle of objective mirror with help of the protractor scale attached inside.

    • vary the distance between the person viewing and the object, try viewing same object again and note down the angle.

    • Do not crumple the template.

    • Make sure that mirror is free from scratches.

Finish Line

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Kailash NR

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