Edmund optics Autocollimator User manual

STEP-BY-STEP INSTRUCTIONS FOR

BUILDING AN AUTOCOLLIMATOR

TECHSPEC®

Optical Cage System

INTRODUCTION 2

What is an autocollimator?

•The Autocollimator is a precision instrument composed of an

achromatic objective, a LED, reticle, beamsplitter, and an eyepiece

with a reticle. The reticle cross-hair is projected onto a reflective

surface, with the returning reflected beam diverted by the beam

splitter to the eyepiece reticle. The deviation in angle is measured by

the eyepiece. This instrument has multiple applications such as

measuring small angles, as well as calibrating and aligning various

optical instruments and components.

Why TECHSPEC Optical Cage System?

•The TECHSPEC Optical Cage System makes alignment easy. In just

a few short steps, a simple autocollimator can be assembled and

aligned. Building an autocollimator with the TECHSPEC Optical Cage

System makes it easy to swap the optics, allowing the user to change

the field of view and resolution quickly and easily. In addition, a

camera could be added in the place of the eyepiece for image

capture or video capability.

OVERVIEW 3

Complete Parts List

Sub-Assemblies:

1. Beamsplitter Assembly

2. Source Arm

3. Objective Arm

4. Eyepiece Arm

Final Touches

Alignment & Calibration

Light Baffling & Mounting

COMPLETE PARTS LIST

STOCK # Description

QUANTITY

03-628 C-Mount Microscope Eyepiece Adapter 1

32-505 25mm 50R/50T Cube Beamsplitter 1

37-692 10X Kellner Adjustable Eyepiece for Reticle 1

39-444 21mm Crosshair Glass Reticle 1

45-415 Achromatic Doublet 30mm Dia. 200mm efl 1

46-105 12.5 D Opal Diffusing Glass 1

53-860 C-Mount 21mm Reticle Mount 1

54-420 19mm Scaled Crosshair Glass Reticle 1

54-615 C-Mount 12mm Lens Mount 1

55-246 C-Mount 12.5 mm Lens Mount 1

58-736 25mm C-Mount Extension Tube 1

58-972 Post Holder, 50.8mm Length, M6 Thread 1

83-143 Stainless Steel Mounting Post, 50.8mm length, M6 Stud 1

85-490 Cage Support Rod 6mm Diameter x 150mm Length, M3 4

85-518 25mm Cage Extension Tube 10mm 1

85-539 25mm Cage Blank Disk 1

85-624 Cage Sphere with (5) 30mm Port and (1) 43mm Port 1

85-627 30mm Cage Port Cover Disk 2

85-630 30mm Standard Cage Plate with M6 for Post Mounting 4

85-632 25mm Standard Cage Plate with M6 for Post Mounting 1

85-688 25/25.4mm Cube Beamsplitter Mount 1

85-719 30mm Cage Plate C-Mount Adapter 2

85-737 30mm Square Interface Plate 1

Coming Soon! 150mm Cage Cover Tube 1

Coming Soon! LED w/power source 1

1. BEAMSPLITTER ASSEMBLY

Parts needed for this step:

BEAMSPLITTER ASSEMBLY 6

STOCK # Description

QUANTITY

32-505 25mm 50R/50T Cube Beamsplitter 1

85-688 25/25.4mm Cube Beamsplitter Mount 1

85-632

25mm Standard Cage Plate with M6 for Post Mounting

85-624 Cage Sphere with (5) 30mm Port and (1) 43mm Port

85-737 30mm Square Interface Plate 1

85-630

30mm Standard Cage Plate with M6 for Post Mounting

1. Insert the Cube Beamsplitter (#32-

505) into the Cube Beamsplitter

Mount (#85-688). Be sure that the

ground surfaces of the beamsplitter

are in contact with the mount and

the optic is centered within the

mount. Lock the optic into place

with set screws. Set Aside.

BEAMSPLITTER ASSEMBLY 7

2. Using M3 SHCS,

attach the 25mm Cage

Mounting Plate (#85-

632) onto the face of

the Sphere (#85-624)

opposite the 43mm

port.

3. Carefully insert the

beamsplitter assembly

(mount first) from Step

1 into the sphere

through the 43mm port.

Slide the base of the

beamsplitter mount into

the 25mm aperture of

the cage plate from

step 2. Use M3 set

screws to lock the

beamsplitter in place

(alignment will be done

later).

BEAMSPLITTER ASSEMBLY 8

4. Attach the Square

Interface Plate (#85-

737) onto the 43mm

port with M3 SHCS.

5. Attach 2 of the 30mm

Cage Mounting Plates

(#85-630) onto

opposite faces of the

sphere. Be sure the

M6 tapped holes are

oriented down toward

the 25mm plate.

2. SOURCE ARM

Parts needed for this step :

SOURCE ARM 10

STOCK # Description

QUANTITY

85-719 30mm Cage Plate C-Mount Adapter 1

54-615 C-Mount 12mm Lens Mount 1

58-736 25mm C-Mount Extension Tube 1

46-105 12.5 D Opal Diffusing Glass 1

55-246 C-Mount 12.5 mm Lens Mount 1

53-860 C-Mount 21mm Reticle Mount 1

39-444 21mm Crosshair Glass Reticle 1

Coming Soon LED with power source 1

6. Take the C-mount 12mm Lens Mount

(#54-615) and insert the LED cable

extending toward the female C-mount

threads. Secure with the retaining ring.

7. Insert the 12.5mm Opal Diffusing Glass

(#46-105) into the C-mount 12.5mm Lens

Mount (#55-246). Secure with the

retaining ring.Attach to the male

threading of the mount from step 6.

8. Take the C-Mount 21mm Reticle Mount

(#53-860) and insert the 21mm Crosshair

Glass Reticle (#39-444) and secure with

retaining ring. Attach to male threading of

the mount from step 7.

SOURCE ARM 11

9. Connect the 25mm C-mount

Extension Tube (#58-736) to the

male threading of the assembly

from step 8.

10. Attach Cage Plate C-MountAdapter

(#85-719) to the male thread of the

assembly from step 9.

11. Insert the entire assembly, C-mount

adapter first, into one of the 30mm

cage plates from step 5. Lock into

place using M3 set screws.

SOURCE ARM 12

3. OBJECTIVE ARM

Parts needed for this step:

OBJECTIVE ARM 14

STOCK # Description

QUANTITY

85-490 Cage Support Rod 6mm Diameter x 150mm Length, M3

85-630 30mm Standard Cage Plate with M6 for Post Mounting 2

45-415 Achromatic Doublet 30mm Dia. 200mm EFL 1

12. Insert four of the 150mm rods (#85-490)

into the remaining 30mm Plate opposite the

the SourceArm. Lock each into place with

M3 set screws.

13. Mount the 30mm x 200mmAchromatic

Doublet (#45-415) into one of the 30mm

Standard Cage plates (#85-630). Note the

orientation of the lens within the plate. Slide

the plate onto the 150mm rods with the bi-

convex element facing away from the

sphere assembly. Keep the plate loose on

the rods for alignment.

14. Attach the final 30mm Standard Cage Plate

to the end of the four 150 mm rods.

Position the plate so it is flush with the end

of the rods. Lock into place with M3 set

screws.

OBJECTIVE ARM 15

4. EYEPIECE ARM

EYEPIECE ARM 17

STOCK # Description

QUANTITY

03-628 C-Mount Microscope EyepieceAdapter 1

54-420 19mm Scaled Crosshair Glass Reticle 1

37-692 10X KellnerAdjustable Eyepiece for Reticle 1

85-719 30mm Cage Plate C-Mount Adapter 1

Parts needed for this step:

15. Insert the 19mm Scaled

Crosshair Glass Reticle (#54-

420) into the 10X Kellner

Adjustable Eyepiece for Reticle

(#37-692). Secure with retaining

ring

16. Insert the Plate C-mount adapter

(#85-719) into the 30mm

aperture of the square plate with

the female threading facing out

and lock into place with M3 set

screws

17. Thread the C-Mount Microscope

Eyepiece Adapter (#03-628)

onto the C-mount adapter from

step 16. Slide the eyepiece into

the adapter and lock into place

with the thumbscrew.

EYEPIECE ARM 18

FINAL TOUCHES

•Loosen the beamsplitter mount and adjust it so that ambient light coming from the objective

goes to the source and eyepiece. Center and level the beamsplitter as much as possible.

Lock into place.

•Simple Calibration: With the LED on take a mirror and place it flat against the outer 30mm

Standard Cage Plate on the objective arm. Look through the microscope eyepiece, adjust

the location of the plate with the achromatic doublet until you see the crosshair from the

source in focus on the eyepiece reticle. Lock that plate onto the rods with M3 set screws.

•Camera Calibration: Place a camera with a fixed focal length lens focused at infinity. Move

the plate with the achromatic doublet until the reticle is in focus. Lock that plate onto the

rods with M3 set screws.

ALIGNMENT & CALIBRATION 20

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