It seems a little odd that in Year 2 Alphans had to wear picture ID, but it hadn't been required in Year 1. Even if the badge provided additional security - perhaps a radio id (RFID) - its function seems to overlap with the commlock, which also had the owner's photo on it.
The first ID badges are seen on the 1996 jackets in Dragon's Domain. It is similar to the Year 2 version- a large black and white photo, with a bar underneath with text: "Security" and the person's surname. There is no vertical stripe on the right, or any section designation.
The Year 2 badge. The top line is a section or job designation. Early episodes included a number alongside (generally "234"). The middle line says "Security". The lower line has the name - a surname, an initial and surname ("S.Benes" here), or just a nickname ("Sahn", in later episodes).
Koenig's ID badge is rarely seen in full, due to his jacket. Uniquely it has a red stripe. His designation is "Commander 1".
Many of the main cast have different ID photos over the series. Koenig has a different photo here, without a red stripe. By the end of the series, the "E" in Koenig has rubbed out.
Medical personnel have their title "Dr." - here "Dr. H.Russell". Note the size of the text differs between the badges seen here.
Helena has a different picture here- it is still "Dr H Russell" but the section now has a number, 195.
In The Exiles, Maya has a badge showing section "Command Centre" but no name (in some scenes, filmed months later, she is named on her badge). For the final "old Maya" scenes, she sometimes has a badge with the name "L.Picard" and a picture of Jenny Cresswell.
Maya still has her badge without a name in All That Glisters. We first see her name on her badge in Journey To Where (we don't see her badge in One Moment of Humanity as she wears a dress or a jacket).
Sometimes, even in the same episode, the picture changes. On the first, Maya's section is "Command Centre" (British spelling). On the second, it is "Command Center" (American spelling).
Also with two badges, Alan's section is first "Command Centre", and then "Chief Pilot".
Alan's "Command Centre" picture has the number "234" (like other Command Centre badges).
And here, Alan is "Astronaut".
Tony Verdeschi is in "Command Centre". His first initial is "T" for Tony, not "A" for Anthony (his real name, according to The Immunity Syndrome).
Sandra Benes is "S.Benes" in early episodes- and "Sahn" in later ones.
Ben Vincent is "Dr.Vincent"- with no initial - in section "Medical 195"
Even though he is working in Command Center, Bill Fraser has the designation "Pilot" in this shot. Note his name is "B.Fraser"- Bill is not short for William. There are different photos in different episodes - in most episodes, Fraser's photo shows him wearing a spacesuit, not a uniform.
Alibe has the name "Ameson" (with no initial).
All the "surface exploration crew" in The Seance Spectre have the "Command Center" designation.
Shermeen is in section "Botanist". The leafy background could be in Hydroponics, or an earlier planetary expedition.
"Jackson" in "Command Center" (with a yellow sleeve), while "Stewart" is in "Security" (but with a red sleeve).
Extras often have no name on their badge- but later Glenda Allen would get her name displayed: "G.Allen".
Copyright Martin Willey. Thanks to Rochard Totis and others.