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Revision 1.3 Camera Module Front Modified Camera Lens Camera Module Lens Modifcation From SingletonMillerWiki The purpose of this project is to replace the stock lens assembly of the Raspberry Pi Camera Module with a larger lens. The aim is to increase the be able to fit other lenses and filters in order to modify the field of view and waveband of operation. Contents 1 Overview 2 Parts Required 3 Tools Required. 3.1 ESD Hazard 4 Step by Step 4.1 Removal of the Basic Lens 4.2 Lens Mount Modification 5 Near Infra Red modification 5.1 Add a Visible Blocking Filter 6 References Overview Conversion From To Parts Required 1. Raspberry Pi Camera Module [1] (http://www.raspberrypi.org/archives/tag/camera-board)

Camera Module Lens Modifcation - SingletonMillerWiki

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Page 1: Camera Module Lens Modifcation - SingletonMillerWiki

Revision 1.3 Camera Module

FrontModified Camera Lens

Camera Module Lens Modifcation

From SingletonMillerWiki

The purpose of this project is to replace the stock lens assembly of the Raspberry Pi Camera Module with alarger lens. The aim is to increase the be able to fit other lenses and filters in order to modify the field of viewand waveband of operation.

Contents

1 Overview2 Parts Required

3 Tools Required.3.1 ESD Hazard

4 Step by Step4.1 Removal of the Basic Lens

4.2 Lens Mount Modification

5 Near Infra Red modification

5.1 Add a Visible Blocking Filter

6 References

Overview

Conversion

From To

Parts Required

1. Raspberry Pi Camera Module [1] (http://www.raspberrypi.org/archives/tag/camera-board)

Page 2: Camera Module Lens Modifcation - SingletonMillerWiki

2. any 1/3rd inch CCTV camera lens [2] (http://www.amazon.co.uk/dp/B006Z5C30E)

Tools Required.

1. 1mm Jewelers screwdriver

2. 4mm Jewelers screwdriver

3. Fine nosed pliers or good tweezers

4. Craft Knife5. ESD mat and strap.

6. 1mm single core wire

ESD Hazard

The Raspberry Pi camera module is a sensitive electronic component and will be suceptable to ESD [3](http://en.wikipedia.org/wiki/Electrostatic_discharge) . Please take sensible precausions or you risk permanentlydamaging your camera.

Step by Step

Before you start you need to know if you want to remove the stock Infra-Red blocking filter in your camera ornot. This should only be attempted if you need to access the near infra-red capabilities of yor RPi Cameramodule.

Turn the camera module over and pull the taps on the flexi connectorto release the flexi, put the flexi in a safe place.

Gently prise the mini connectoroff the camera board.

Page 3: Camera Module Lens Modifcation - SingletonMillerWiki

Peal the lens assembly off the board, it only stuck on with an adhesivepad. The board and the lens should now be free. Put the board in a

safe place taking care not to contaminate the adhesive pad, we aregoing to reuse it.

Removal of the Basic Lens

Once you've removed the module from the camera board removing thelens is simply achieved using a pair of pliers to grip the threaded end of

the lens and unscrew it anti-clockwise. Refit the module to the board

and be sure to lightly screw the lens back into place to prevent any

dust getting on to the filter.

Page 4: Camera Module Lens Modifcation - SingletonMillerWiki

Removal of the lens only, leave

the blocking filter in place to

protect the array.

Notice the original module is easily

covered by the 1/3rd inch

housing.

Rear view shows the mounting

holes don't quite match, shame its

quite close!

Lens Mount Modification

Place the body of the CCTVlens on top of the camera

module, be careful to avoid

touching the array or gettingdust into the module. The holes

for the new housing don't quite

line up but we'll fit that in a

minute.

Page 5: Camera Module Lens Modifcation - SingletonMillerWiki

Lens body fouls the connectorTry to make yours a bit neater!

The new lens body is too large

and fouls the mini connector.

Using a craft knife carefullywaste away enough plastic to

allow the body to sit flush over

the connector.

Using the wire, thread a shortlength through the holes in the

board and the lens body, twist

the wire to secure the body to

the board. Bend the wire up soit cant get trapped under the

board and short something out!

This is a temporary method of

securing the lens housing. Onceyou're happy with the

concentricity of the new

housing to the array the bodycan be secured with any

suitable adhesive.

Page 6: Camera Module Lens Modifcation - SingletonMillerWiki

1/3rd" 16mm F1.2 Lens

Fit the lens of your choice to the body and now your new camera is

ready for focusing. Don't Forget to remove the original lens with the

tweezers otherwise you won't be able to focus the new lens!

Fit the lens of your choice to

the body and now your new

camera is ready for focusing

Near Infra Red modification

Proceed as per the basic modifcation only remove the NIR filter as follows.

Take a fine bladed scredriver and work along the joint of the lens

assembly, the idea is to gently dig through the plastic just above the

metal base. This take a little time and patience and is considerably

safer than using a knife! Once there's a gap between the parts use alarger bladed screwdriver to crack the seal and the lens assembly will

'pop off'.

Page 7: Camera Module Lens Modifcation - SingletonMillerWiki

Red tint its the IR filter

Stock Lens assembly removed

Salvage the lens assembly and

store in a safe place, the filter

will be of use later. Carefully

handle the now bare cameraarray, refit this to the board. Its

better to fit the mini connector

first and let the regidity of the

flexi re-align the array to the

adhesive pad. Gently press the

arry on to the pad avoid

touching the array, use theedges only.

Add a Visible Blocking Filter

This process modifies the lens cap from the 1/3rd inch lens to take a visible blocking filter [4](http://www.ebay.com/itm/5pcs-10mm-Filter-Lens-against-400nm-750nm-808nm-1064nm-IR-Infrared-Laser-Pass-/290728770467?ssPageName=ADME:L:OU:GB:3160) . The idea is to make a cap for the lensthat can be fitted to temporarily turn any RPi module without a NIR blocking filter into an infra-red camera byblocking the visible light. Operation of a RPi Camera module with any filter will produce images with both colourand NIR content.

Using a small bladed screwdriver pierce the top of the plastic lens cap.

Work around in a circle slightly smaller than the filter

Page 9: Camera Module Lens Modifcation - SingletonMillerWiki

Job done!

References

1. RaspberryPi Camera Module (http://www.raspberrypi.org/archives/tag/camera-board)

2. 16mm F2.0 1/3" Replacement Board Lens for CCTV Camera

(http://www.amazon.co.uk/dp/B006Z5C30E)

3. Electrostatic discharge (http://en.wikipedia.org/wiki/Electrostatic_discharge)

4. 10mm Visable blocking filter (http://www.ebay.com/itm/5pcs-10mm-Filter-Lens-against-400nm-750nm-808nm-1064nm-IR-Infrared-Laser-Pass-/290728770467?ssPageName=ADME:L:OU:GB:3160)

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This page was last modified on 22 June 2013, at 16:38.