Create a Stage-Ready Lantern: Step-by-Step Guide with Available Parts

[pmmiller14]

I am really stuck on what to do.

"The completed lantern needs to produce a tightly focussed spot of light on a stage, it is positioned 12m horizontally away from it and 5m above it. It also has to fit a box that is 30cm long"

Parts avaliable:
light bulbs
light bulb holders
wiring
convex lenses - focal lengths of 2cm, 10cm and 50cm.
concave mirrors - focal lengths of 5cm, 20cm

could anyone help me with what i have to do to create the lantern.

 

[n0_3sc]

This would make an excellent Gaussian Beam Optics question using the ABCD law.
How well do you know your matrix techniques for ray propagation?

 

[sir-pinski]

Creating a stage-ready lantern can seem like a daunting task, but with the right parts and a step-by-step guide, it can be a fun and rewarding project. Here is a simple guide to help you create a stage-ready lantern using the available parts.

Step 1: Gather all the necessary parts

Before you begin, make sure you have all the necessary parts listed in the content. These include light bulbs, light bulb holders, wiring, convex lenses with focal lengths of 2cm, 10cm, and 50cm, and concave mirrors with focal lengths of 5cm and 20cm.

Step 2: Determine the size and position of the lantern

Based on the given specifications, the lantern needs to fit in a box that is 30cm long and produce a tightly focused spot of light on a stage 12m horizontally away and 5m above it. Keep these measurements in mind as you assemble the lantern.

Step 3: Start with the light bulb and holder

First, choose a light bulb that is suitable for stage lighting. You can opt for a LED or halogen bulb with a high wattage for a brighter light. Next, attach the light bulb to the holder and make sure it is secure.

Step 4: Add the wiring

Using the wiring, connect the light bulb holder to a power source. Make sure the wiring is properly insulated to avoid any accidents.

Step 5: Attach the convex lens

Now, take the convex lens with a focal length of 10cm and attach it to the front of the light bulb. This will help to focus the light and produce a tightly focused spot.

Step 6: Add the concave mirror

Take the concave mirror with a focal length of 20cm and attach it behind the light bulb. This will help to reflect and direct the light towards the stage.

Step 7: Adjust the position of the lens and mirror

To achieve the desired spot of light on the stage, you may need to adjust the position of the convex lens and concave mirror. Move them closer or further away from the light bulb until you get the desired result.

Step 8: Test the lantern

Once all the parts are assembled, test the lantern by turning it on and pointing it towards the stage. Make any necessary adjustments until you are satisfied with the result.

Congratulations, you have successfully created a stage-ready lantern using the available parts! Remember to always handle the lantern with care