Andrei Tsiboulia

Optical Measurements -Development & Design

Schlieren Method for Studying Gas Flow

Condenser mirror projects the bulb filament onto the entrance pupil of the Schlieren system.

The first (collimating) doublet has a Ronci Rolling in its front focal plane and sends collimated light through the gas flow area .

The second (focusing) doublet focuses light onto the second Ronci Rolling, which is the negative of the first one.

The second doublet and a camera lens form the image of the gas flow area on a screen.

Mini Spectrometer Optical System

Few optical systems for mini spectrometers were designed.

Here is one of them imported from Opticad.

Astigmatism of the system is reduced due to a two-layer optical design.

Light beam from a SM fiber is collimated by a doublet.

Diffraction grating disperses it.

Dispersed light is focused by a mirror onto a CCD array.

Another Mini Spectrometer Optical System

Optical Test Lab organized for R&D

Spectral Measurements

Spectral Measurements 2

Figure 7. Large window or filter (left, on the 3D stage) and small notch filter (right, in the notch filter holder) installed in front of the spectrometer

Temperature Spectral Measurements

Lens / Window Resolution Test

3D

stageFigure 1. The Test Setup

USAF

target

Lens

Microscope

Target imageWindow (optional)

LED panel, white, 850 & 940 nm

HD camera

Diffusive films

Lens / Window Resolution Test 2

Correlated color temperature measurements

Figure 4. UV Cromatisty Diagram for LED

3800

3900

4000

4100

4200

4300

4400

4500

0 4199

1 45362 4539

3 4257

4 4238

0.328

0.329

0.330

0.331

0.332

0.333

0.334

0.335

0.336

0.337

0.338

0.339

0.340

0.21

0

0.21

1

0.21

2

0.21

3

0.21

4

0.21

5

0.21

6

0.21

7

0.21

8

0.21

9

0.22

0

0.22

1

0.22

2

0.22

3

0.22

4

0.22

5

0.22

6

0.22

7

0.22

8

0.22

9

VCSEL Illumination

VCSEL Illumination 2

VCSEL Illumination 3

Camera Dynamic Range Measurements

CUT

Lamp

Enclosure

Window

Diffuser

VDF

Figure 2. Test Concept

Special Illuminator

Camera Dynamic Range Measurements 2

Backscatter diagram measurement

Backscatter diagram measurement