BSM330 Zoom Stereo Microscope

BSM330 Zoom Stereo Microscope

BSM330B with binocular head	BSM330T with trinouclar head

Quick Review

• Binocular / Trinocular head, inclined at 45°, rotatable360°, Interpupilary Distance 54-76mm
• Wide field eyepiece 10×/Φ22mm
• Zoom objective 0.7×～4.6×, Zoom ratio 1:6.6
• High resolution, Wide viewing field, Long working distance of 110mm
• High quality, high function and excellent cost performance. Ideal instrument in academic, medical and industrial field.

Introduction

Stereo microscopes are also known as low magnification and dissecting microscopes. BSM330 Stereo Zoom Microscopes offer high quality 3D images throughout the zoom range. Optional eyepieces and auxiliary objectives expand magnification range and working distances.

BSM330 is a very popular zoom stereo microscope. Optional cold light and ring light can be chosen for this microscope. You can also choose trinocular head to add digital camera with the appropriate camera adapter. In summary BSM330 gives many range of magnifications, working distances, photo options, accessories and is very convenient to use – no wonder it is popular!

Features

1. High quality and excellent cost performance.

2. Ergonomic design, sharp image display, wide viewing field and easy to operate.

3. Providing a wide viewing field of Φ22mm with the zoom ratio of 1:6.6.

4. Transmitting & Reflecting LED Illumination.

5. Ideal instrument in academic, medical and industrial field.

Application area

BSM330 series stereo microscopes are of great value in a variety of applications such as school education, circuit board repair, circuit board inspection, surface mount technology work, electronics inspection, coin collecting, gemology and gemstone setting, engraving, repair and inspection of small parts.

Specifications

Note: ● Standard Outfit, ○ Optional

Objective, Eyepiece Parameters

Optional Accessories

BSM330B with Universal Stand BSZ-F15

Case Study

A client wrote:  Interested in a trinocular zoom stereoscope with the widest field of view (to the camera, we have a Lumenera Infinity2-1R, 1/2" 1.4 MPixel) possible.  Probably would need 0.5X aux lens.  BUT CAN YOU PROVIDE for me with the field-of-view we could achieve (with our camera)?  We need to use this to teach neuroanatomy, meaning about 2 cm horizontal field of view (at lowest mag setting).

Answer:

To get the largest field of view, a good combination of the camera sensor and the c-mount adapter is the key. As you know well, we see circular in eyepieces but a camera sees a rectangular or square. Depending on the c-mount adapter magnification, we can fit the camera FOV square or rectangle into the eyepiece circle. If we go further than eyepiece FOV circle, there won’t be any signal to the corners of the square. Then the sensor will generate an image with black corners (called vignetting).

Depending on the stereoscope model, it is possible to get 20-22mm width image assuming a perfect camera-adapter is used. In most cases, we can reach this without a 0.5x c-mount adapter. Since you like to use your own camera with 1/2” sensor, we need to provide a 0.5x c-mount adapter.

You need to use BSM330T or higher models to get such a large FOV. Using a 0.5x aux lens will be an advantage.

….

Next, we asked the client to send his own sample and camera to test. Here are the rest of further works:

We have done some works and sending you the images in a separate email via an external link. Please read these comments before and after viewing those images.

– The file name describes the imaging condition: date_camera_c-munt_adapter_scope zoom_sample.jpg

– we tested so many c-mount adapters, including default and custom 035x, 0.5x and 1x c-mount adapter with your Infinity 2 Camera. Some of the images are presented.

– The 0.35x gives largest FOV but it has some vignetting issue, as expected.

– The custom 0.5x c-mount adapter gives a better result with your camera. However, it has a minor black corner on one side. You may not like it.

– The 1x c-mount adapter helps you increase the magnification twice in comparison to 0.5x c-mount adapter, i.e. it will be like using 20x/FN10 eyepieces vs 10x /FN20 or adding a 2x aux lens.

– At 0.85x zoom, you can have the whole view of your sample

– Using a calibration slide, now we know your camera has an FOV of 20mmx15mm (HxV) at the lowest magnification 0.7x zoom.

If you do not like to have black corners in your images, you need to either upgrade the microscope or change the camera. This will depend on your budget.

Thus, I tested this with our BIC-T3C-2.3C 2.3MP 1/1.2” CMOS camera.

– This camera has an FOV of 22.5x14mm (HxV) at the lowest magnification 0.7x zoom.

– Some sample images were also shown.

– Frankly speaking, this camera has better image quality, much more natural color and higher sensitivity than yours. I guess ours has also better price, i.e. $1,089 USD.

Last but not least, we also used our BioStitch Live Image Stitching Software and manually stitched your sample images at the highest zoom of 4.5x and 0.5x c-mount adapter. Using 1x c-mount adapter will increase the resolution twice.  If you decide to get the BIC-T3C-2.3C camera, we can offer this software ($1,499) totally free.

Result: the customer was extremely happy with the prepare dimages, purchased the stereoscope and enjoyed it.