Dichroic Long-Pass Filter 540nm (sm peak 420-460nm) 25mm diam

This filter is in excellent condition. It has the following characteristics:

� Diameter = 25mm
� Thickness = 7.8mm
� No mounting cell
� Filter type – interference dichroic
� Part number – G2500-23012-1 (Rev. B)

This is a long pass dichroic with the beam-split at 540nm (measured). There is also a greatly attenuated pass region between 420 and 460nm.

Transmission characteristics are measured with the filter mounted at 45 degrees to the optic axis. The reflection characteristics are complementary to the transmission characteristics. ..

Photo set 1202 .

BMI Surplus, Inc. is your #1 resource for new, pre-owned &
refurbished optical equipment, optical tables, laser tables, legs and bases. We
will work with you individually to find the perfect set up, for
your application.
Buy online or give us a call at 781-871-8868. We’re here ready
to help you!
**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of shipping sensitive scientific & industrial equipment.
We ship with the utmost care!!
***MPN G2500-23012-1
***OEM Custom
***SKU*** 18496

Chroma Dichroic Filter Long Pass 485nm 25mm diameter.

This Chroma filter is in excellent condition.. It has the following characteristics:

� Diameter = 25mm
� Thickness = 6mm
� No mounting cell
� Filter type – interference dichroic
� Part number – unknown

This is a long pass dichroic with the beam-split at 483nm (measured). There is also a greatly attenuated pass region between 425 and 470nm.

Transmission characteristics are measured with the filter mounted at 45 degrees to the optic axis. The reflection characteristics are complementary to the transmission characteristics..

BMI Surplus, Inc. is your #1 resource for new, pre-owned &
refurbished optical equipment, optical tables, laser tables, legs and bases. We
will work with you individually to find the perfect set up, for
your application.
Buy online or give us a call at 781-871-8868. We’re here ready
to help you!
**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of shipping sensitive scientific & industrial equipment.
We ship with the utmost care!!
***MPN Unknown
***OEM Chroma
***SKU*** 18495

Chroma Dichroic Filter, Long Pass, 532nm, 25mm diameter.

This Chroma filter is in excellent condition. The nomenclature on the envelope was difficult to decipher. The 532 is very legible, but I am uncertain if I have the letters transcribed correctly. The filter has the following characteristics:

� Diameter = 25mm
� Thickness = 6mm
� No mounting cell
� Filter type – interference dichroic
� Part number – 532XRBCM (?)

This is a long pass dichroic with the beam-split at 540nm (measured). There is also a greatly attenuated pass region between 450 and 525nm.

Transmission characteristics are measured with the filter mounted at 45 degrees to the optic axis. The reflection characteristics are complementary to the transmission characteristics..

BMI Surplus, Inc. is your #1 resource for new, pre-owned &
refurbished optical equipment, optical tables, laser tables, legs and bases. We
will work with you individually to find the perfect set up, for
your application.
Buy online or give us a call at 781-871-8868. We’re here ready
to help you!
**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of shipping sensitive scientific & industrial equipment.
We ship with the utmost care!

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search.
***MPN 532XRBCM 25mm
***OEM Chroma
***SKU*** 18494

Chroma Dichroic Band Stop 460 – 600nm lines at 554 and 567nm.
This Chroma filter is in very good condition, having been removed from some prototype equipment. It has the following characteristics:

� Diameter = 25mm
� Thickness = 2mm
� No mounting cell
� Filter type – interference dichroic
� Part number – 625DCXR

The filter appears to be dual-excitation dichroic. The wavelength characteristics are rather complicated. There is a sharp band stop region that extends from 460nm to 600nm, with transmission lines at 554 and 567nm.

Transmission characteristics are measured with the filter mounted at 45 degrees to the optic axis. The reflection characteristics are complementary to the transmission characteristics. The surface of the filter may have a very fine void or two, but the ‘mottled’ appearance in the photo is actually a reflection artifact – the filter coating is very even.

Photo set 1197.

BMI Surplus, Inc. is your #1 resource for new, pre-owned &
refurbished optical equipment, optical tables, laser tables, legs and bases. We
will work with you individually to find the perfect set up, for
your application.
Buy online or give us a call at 781-871-8868. We’re here ready
to help you!
**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of shipping sensitive scientific & industrial equipment.
We ship with the utmost care!

***MPN 625DCXR 25mm
***OEM Chroma
***SKU*** 18491

Chroma Dichroic Filter Band Stop 490 ? 525nm.

This Chroma filter, in excellent condition, has the following characteristics:

� Diameter = 25mm
� Thickness = 3mm
� Free aperture = 23mm
� No mounting cell
� Filter type – interference, with high-Q stop band

Bandpass characteristics were measured with the filter at 45 degrees to optic axis. This filter appears to block the spectral region between 490nm and 525nm. Reflected color in photo appears ‘wrong’ because it was taken normal to optic axis. If needed, I can measure characteristics at normal to optic axis.

Photo set 1196.

BMI Surplus, Inc. has a huge inventory of used, new and pre-owned Optical Windows and Flats for sale.
We will work with you individually to find the perfect set up for your application.

Buy online or give us a call at 781-871-8868. We have experienced customer service representatives standing by ready to help you!

BMI Surplus, Inc. is a dealer in used and sometimes new Surplus Scientific and Industrial Equipment – we cater to clients in search of items to be used for specific applications.
We do not offer a guarantee as many of our items are purchased by professionals in need of parts and pieces.
You will find many of our items listed on our website as untested or as parts or repair units even though in they are in good used condition.

**Shipping, Handling and Freight fees are dependent on your location.
We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier.
We have 32 years of experience shipping sensitive scientific instruments and industrial equipment!

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search.
***MPN Unknown
***OEM Chroma
***SKU*** 18490

This Chroma filter is in excellent condition, having been removed from some prototype equipment. It has the following characteristics:

� Dimensions = 25mm x 18mm
� Thickness = 3mm
� No mounting cell
� Filter type – interference dichroic

The filter appears to be dual-excitation dichroic. The wavelength characteristics are rather complicated. There is a sharp bandpass region that extends from 450 to 465nm. Then again, starting at 478nm it behaves for the most part like a long-pass filter. In addition, there are two very strong blocking lines at 538nm and 633nm.

Transmission characteristics are measured with the filter mounted at 45 degrees to the optic axis. The reflection characteristics are complementary to the transmission characteristics. The part number of the filter is not known. There is a bit of mounting medium (appears to be silicone) still clinging to the edge of the filter. Filter surface is free of blemishes.

Photo set 1195..

BMI Surplus, Inc. has a huge inventory of used, new and pre-owned Optical Filters for sale.
We will work with you individually to find the perfect set up for your application.

Buy online or give us a call at 781-871-8868. We have experienced customer service representatives standing by ready to help you!

BMI Surplus, Inc. is a dealer in used and sometimes new Surplus Scientific & Industrial Equipment – we cater to clients in search of items to be used for specific applications.
We do not offer a guarantee as many of our items are purchased by professionals in need of parts and pieces.
You will find many of our items listed on our website as untested or as parts or repair units even though in they are in good used condition.

**Shipping, Handling & Freight fees are dependent on your location.
We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier.
We have 32 years of experience shipping sensitive scientific instruments & industrial equipment!

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search.
***MPN Unknown
***OEM Chroma
***SKU*** 18489

Aperture Turret in Centerable Mount..

This is a precision pinhole diaphragm turret complete with centerable mount and nine graded pinholes (lettered �A� through �H�) and one square aperture, lettered �J�. The size of the pinholes appears to range from approximately 1.75mm to 1.5mm. The square aperture is approximately 0.3mm on a side. All of these are very rough measurments.

Centration of the turret is accomplished via two Mitutoyo micrometer spindles reading to 0.01mm
Centration range is plus or minus 3mm
50mm diameter dovetail mounting flanges on both sides
Distance between outer flange faces is 32mm
Overall diameter of the black housing is 72mm

The apparatus is in very fine condition. The pinholes do not have any blemishes. The square aperture corners do appear to be slightly rounded. This is obviously a commercially made product but we were unable to discover who manufactured it.

Location MB 141.

Photo set 987.

BMI Surplus, Inc. is your #1 resource for new, pre-owned,
recycled, refurbished & used optics, optical tables, laser
tables, vibration isolation systems, legs and bases & optical support & optical accessories.
We will work with you individually to find the perfect set up for your application. Shop our Optical Tables for the most competitive optical table price.
Buy online or give us a call at 781-871-8868. We’re here ready
to help you!
**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of shipping sensitive scientific instruments & industrial
equipment
We ship with the utmost care!
***MPN
***OEM Custom
***SKU*** DP540